Product Description - Cisco ASR 5000 Series Administration Manual

HRPD Serving Gateway Overview

Product Description

The HSGW terminates the eHRPD access network interface from the Evolved Access Network/Evolved Packet Core
Function (eAN/ePCF) and routes UE-originated or terminated packet data traffic. It provides interworking with the
eAN/ePCF and the PDN Gateway (P-GW) within the Evolved Packet Core (EPC) or LTE/SAE core network and
performs the following functions:
Mobility anchoring for inter-eAN handoffs
Transport level packet marking in the uplink and the downlink, e.g., setting the DiffServ Code Point, based on
the QCI of the associated EPS bearer
Uplink and downlink charging per UE, PDN, and QCI
Downlink bearer binding based on policy information
Uplink bearer binding verification with packet dropping of UL traffic that does not comply with established
uplink policy
MAG functions for S2a mobility (i.e., Network-based mobility based on PMIPv6)
Support for IPv4 and IPv6 address assignment
EAP Authenticator function
Policy enforcement functions defined for the Gxa interface
Robust Header Compression (RoHC)
Support for VSNCP and VSNP with UE
Support for packet-based or HDLC-like framing on auxiliary connections
IPv6 SLACC support, generating RAs responding to RSs
An HSGW also establishes, maintains and terminates link layer sessions to UEs. The HSGW functionality provides
interworking of the UE with the 3GPP EPS architecture and protocols. This includes support for mobility, policy control
and charging (PCC), access authentication, and roaming. The HSGW also manages inter-HSGW handoffs.
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Cisco ASR 5000 Series HRPD Serving Gateway Administration Guide ▄
Product Description ▀