HRPD Serving Gateway Overview
Cisco ASR 5000 Series Product Overview ▄
Support for multiple PDN connections
Leverage existing CDMA infrastructure
Migration path to LTE
Minimal changes to RAN infrastructure
Support handoffs between LTE RAN(E-UTRAN) and eHRPD
eHRPD Network Components
The eHRPD network is comprised of the following components:
Evolved Access Network (eAN)
The eAN is a logical entity in the radio access network used for radio communications with an access terminal (mobile
device). The eAN is equivalent to a base station in 1x systems. The eAN supports operations for EPS – eHRPD RAN in
addition to legacy access network capabilities.
Evolved Packet Control Function (ePCF)
The EPCF is an entity in the radio access network that manages the relay of packets between the eAN and the HSGW.
The ePCF supports operations for the EPS – eHRPD RAN in addition to legacy packet control functions.
The ePCF supports the following:
Main service connection over SO59
Uses PDN-MUX and allows multiplexing data belonging to multiple PDNs
Signaling over Main A10
LCP messages for PPP link establishment
EAP messages used for authentication
VSNCP messages for establishment of PDNs
VSNP for establishment of EPS bearers and QoS mappings (RSVP)
HRPD Serving Gateway (HSGW)
The HSGW is the entity that terminates the HRPD access network interface from the eAN/PCF. The HSGW
functionality provides interworking of the AT with the 3GPP EPS architecture and protocols specified in 23.402
(mobility, policy control (PCC), and roaming). The HSGW supports efficient (seamless) inter-technology mobility
between LTE and HRPD with the following requirements:
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