â–€ eHRPD Network Summary
â–„ Cisco ASR 5000 Series Product Overview
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:
Sub 300ms bearer interruption
Inter-technology handoff between 3GPP E-UTRAN and HRPD
Intra-technology handoff between an HSGW and an existing PDSN
Support for inter-HSGW fast handoff via PMIPv6 Binding Update
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