для Cisco Cisco ASR 5500
Serving GPRS Support Node (SGSN) Overview
SGSN Core Functionality ▀
SGSN Administration Guide, StarOS Release 17 ▄
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SGSN Core Functionality
The SGSN core functionality is comprised of:
All-IP Network (AIPN)
AIPN provides enhanced performance, future-proof scaling and reduction of inter-connectivity complexity.
In accordance with 3GPP, the SGSN provides IP-based transport on all RAN and core network interfaces, in addition to
the standard IP-based interfaces (Ga, Gn, Gp, Iu-Data). The all-IP functionality is key to facilitating Iu and Gb Flex
(SGSN pooling) functionality as well as evolution to the next generation technology requirements.
the standard IP-based interfaces (Ga, Gn, Gp, Iu-Data). The all-IP functionality is key to facilitating Iu and Gb Flex
(SGSN pooling) functionality as well as evolution to the next generation technology requirements.
The following IP-based protocols are supported on the SGSN:
SCTP
M3UA over SCTP
GTPv0 over UDP
GTPv1 over UDP
GTPv2 over UDP (S4-SGSN only)
GTP-U over UDP
Diameter over TCP and SCTP (S4-SGSN only)
SS7 Support
StarOS SGSN implements SS7 functionality to communicate with the various SS7 network elements, such as HLRs
and VLRs.
and VLRs.
The SGSN employs standard Signaling System 7 (SS7) addressing (point codes) and global title translation. SS7 feature
support includes:
support includes:
Transport layer support includes:
Broadband SS7 (MTP3B/SSCF/SSCOP/AAL5)
Narrowband SS7 (high speed and low speed) (only available on an ASR 5000 chassis)
SIGTRAN (M3UA/SCTP/IP)