Cisco Cisco ASR 5000
Serving GPRS Support Node (SGSN) Overview
▀ SGSN Core Functionality
▄ SGSN Administration Guide, StarOS Release 18
SGSN in LTE/SAE Network
Beginning in release 14.0, an SGSN can function in an LTE/SAE network using enhancements to support various other
interfaces including an S4 interface. In these cases, the SGSN is referred to as an S4-SGSN.
interfaces including an S4 interface. In these cases, the SGSN is referred to as an S4-SGSN.
Serving Gateway Call Detail Records (S-GW-CDRs)
The S4-SGSN does not support S-CDRs because the S4 interface is used, per PDP (or EPS bearer) and charging records
are generated by the S-GW using the S-GW-CDR. The S-GW collects the charging information per user per IP-CAN
bearer. The collected information is called as S-GW-CDR and sent to the Charging Gateway over the Gz interface.
are generated by the S-GW using the S-GW-CDR. The S-GW collects the charging information per user per IP-CAN
bearer. The collected information is called as S-GW-CDR and sent to the Charging Gateway over the Gz interface.