Cisco Cisco ASR 5000

Contents ▀

SGSN Administration Guide, StarOS Release 18 ▄

NRI-FQDN based DNS resolution for non-local RAIs (2G subscribers) ............................................ 67

NRI Handling Enhancement ............................................................................................................... 67

NRPCA - 3G ....................................................................................................................................... 67

NRSPCA Support for S4-SGSN ......................................................................................................... 67

Operator Policy ................................................................................................................................... 68

Some Features Managed by Operator Policies ............................................................................. 68

Overcharging Protection .................................................................................................................... 68

QoS Traffic Policing per Subscriber ................................................................................................... 68

QoS Classes .................................................................................................................................. 69

QoS Negotiation ............................................................................................................................. 69

DSCP Marking ............................................................................................................................... 69

Traffic Policing ............................................................................................................................... 69

VPC-DI platform support for SGSN .................................................................................................... 70

Reordering of SNDCP N-PDU Segments .......................................................................................... 70

RAN Information Management (RIM) ................................................................................................. 70

S4 Support on the SGSN ................................................................................................................... 71

S3 and S4 Interface Support ......................................................................................................... 72

S4-SGSN Support for .................................................................................................................... 73

S6d and Gr Interface Support ........................................................................................................ 73

Configurable Pacing of PDP Deactivations on the S4-SGSN ....................................................... 74

DNS SNAPTR Support .................................................................................................................. 74

S4-SGSN Statistics Support .......................................................................................................... 74

S13’ Interface Support ................................................................................................................... 75

Idle Mode Signaling Reduction ...................................................................................................... 75

ISR with Circuit Switched Fallback ................................................................................................ 75

ISD / DSD Message Handling and HSS Initiated Bearer Modification .......................................... 76

UMTS-GSM AKA Support on the S4-SGSN.................................................................................. 77

3G and 2G SGSN Routing Area Update ....................................................................................... 77

IPv4 and IPv6 PDP Type Override ................................................................................................ 78

NAPTR-based Dynamic HSS Discovery ....................................................................................... 78

P-GW Initiated PDP Bearer Deactivation ...................................................................................... 79

S-GW and P-GW Tunnel and EPS Subscription Recovery ........................................................... 79

Local Configuration of S-GW and S4-SGSN per RAI .................................................................... 79

Configurable GUTI to RAI Conversion Mapping ............................................................................ 79

S4-SGSN Support for Fallback to V1 Cause Code in GTPv2 Context Response ........................ 80

S4-SGSN Support for Mobility Management Procedures ............................................................. 80

QoS Mapping Support ................................................................................................................... 80

MS Initiated Primary and Secondary Activation............................................................................. 81

Deactivation Procedure Support .................................................................................................... 81

MS, PGW and HSS Initiated PDP Modification Procedure Support .............................................. 81

Fallback from the S4 Interface to the Gn Interface ........................................................................ 82

Operator Policy Selection of S4 or Gn Interface ............................................................................ 83

IDFT Support During Connected Mode Handovers ....................................................................... 83

Disassociated DSR Support .......................................................................................................... 83

SGSN Serving Radio Network Subsystem (SRNS) Relocation Support ....................................... 84

E-UTRAN Service Handover Support ............................................................................................ 84

Support for Gn Handoff from S4-SGSN to 2G/3G Gn SGSN ........................................................ 85

Suspend/Resume Support on the S4-SGSN ................................................................................. 85

Flex Pooling (Iu / Gb over S16) Support on the S4-SGSN ............................................................ 86

LORC Subscriber Overcharging Protection on S4-SGSN ............................................................. 86

Summary of Functional Differences between an S4-SGSN and an SGSN (Gn/Gp)..................... 86

Session Recovery .............................................................................................................................. 92

SGSN Pooling and Iu-Flex / Gb-Flex ................................................................................................. 93

Gb/Iu Flex Offloading ..................................................................................................................... 93