▄ Cisco ASR 5000 Series Product Overview 
WiMAX Reference Points and Interfaces ....................................................................................................... 166 
Message Relay in ASN .................................................................................................................................... 167 
ASN Gateway Architecture and Deployment Profiles .................................................................................... 167 
WiMAX Network Deployment Configurations ................................................................................................... 169 
Standalone ASN Gateway/FA and HA Deployments ..................................................................................... 169 
Co-Located Deployments ................................................................................................................................ 169 
ASN Call Procedure Flows .................................................................................................................................. 171 
Functional Components for Handover ............................................................................................................ 171 
Anchor ASN Gateway ................................................................................................................................ 171 
Anchor Session ........................................................................................................................................... 171 
Non-Anchor ASN Gateway ........................................................................................................................ 172 
Non-Anchor Session ................................................................................................................................... 172 
Initial Network Entry and Data Path Establishment without Authentication .................................................. 173 
Initial Network Entry and Data Path Establishment with Authentication (Single EAP) ................................. 175 
Unexpected Network Re-entry ........................................................................................................................ 177 
MS Triggered Network Exit ............................................................................................................................ 178 
Network Triggered Network Exit .................................................................................................................... 179 
Intra-ASN Gateway Handover ........................................................................................................................ 181 
Intra-anchor ASN Gateway Uncontrolled Handover .................................................................................. 181 
Intra-anchor ASN Gateway Controlled Handover ...................................................................................... 183 
Inter-ASN Gateway Handover ........................................................................................................................ 189 
ASN Gateway Function for Handovers ...................................................................................................... 190 
Controlled Anchor ASN Gateway to Non-Anchor ASN Gateway Handover ............................................ 191 
Uncontrolled Anchor ASN Gateway to Non-Anchor ASN Gateway Handover ........................................ 196 
RADIUS-based Prepaid Accounting for WiMax ............................................................................................ 198 
Obtaining More Quota after the Quota is Reached ..................................................................................... 198 
Applying HTTP Redirection Rule when Quota is Reached ....................................................................... 200 
Applying HTTP Redirection Rule CoA is Received .................................................................................. 202 
Terminating the Call when Quota is Reached ............................................................................................ 204 
CSN Procedure Flows .......................................................................................................................................... 206 
PMIP4 Connection Setup and Call Flow with DHCP Proxy ........................................................................... 206 
PMIP4 Session Release ................................................................................................................................... 208 
WiMAX Deployment with Legacy Core Networks ............................................................................................. 210 
ASN Gateway Interoperability with 3GPP Overlay ........................................................................................ 210 
ASN Gateway Interoperability with 3GPP2 Overlay ...................................................................................... 210 
Session Continuity Support for 3GPP2 and WiMAX Handovers ................................................................... 211 
NSP-ID and NAP-ID Functionality ..................................................................................................................... 212 
Manual Mode .................................................................................................................................................. 212 
Automatic Mode .............................................................................................................................................. 212 
ASN GW and NAP-ID/NSP-ID Process ......................................................................................................... 213 
Data Tunnel Endpoint Support ............................................................................................................................. 214 
ASNGW with a Different Tunnel Endpoint .................................................................................................... 214 
No Handoff (INE) ........................................................................................................................................... 214 
Inter-ASNGW Handoff ................................................................................................................................... 215 
Intra-ASNGW Handoff .............................................................................................................................. 215 
Supported Standards............................................................................................................................................. 216 
WiMAX/IEEE References .............................................................................................................................. 216 
IEEE Standards ............................................................................................................................................... 216 
IETF References .............................................................................................................................................. 216 
Object Management Group (OMG) Standards ................................................................................................ 217 
ASN Paging Controller and Location Registry Overview ........................... 219 
Introduction .......................................................................................................................................................... 220 
Description of PC/LR Support ........................................................................................................................ 222 
Licenses ........................................................................................................................................................... 222 
Paging and Location Update Procedures ......................................................................................................... 222