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3GPP Glossaries:  Interfaces / Reference Points
for letter 'S' (6 of 6)

 

Sv   (GTPv2-C)

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between  MSC
and  MME / SGSN

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specified from  Rel-8  in
TS 23.216, clause 5.4.2
TS 29.280 

This interface is used to support Inter-RAT handover from IMS-based voice service over EPS to CS domain over 3GPP UTRAN/GERAN access or from UTRAN (HSPA) to 3GPP UTRAN/GERAN access and to support Inter-RAT handover from IMS based voice and video service over EPS to CS domain over 3GPP UTRAN access.

This interface is also used to support Inter-RAT handover from voice service in CS domain over 3GPP UTRAN/GERAN access to IMS based service over LTE or UTRAN (HSPA).

Sv Messages (TS 29.280, clause 5.2)
  • SRVCC PS to CS Request/Response
  • SRVCC PS to CS Complete Notification/Acknowledge
  • SRVCC PS to CS Cancel Notification/Acknowledge
  • SRVCC CS to PS Request/Response
  • SRVCC CS to PS Complete Notification/Acknowledge
  • SRVCC CS to PS Cancel Notification/Acknowledge


SWa   (Diameter)

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see it   here

specified from  Rel-8  in
TS 23.402, clause 4.4
TS 29.273, clause 4 

This interface enables support for the Untrusted non-3GPP IP Access with the 3GPP AAA Server/Proxy and transports access authentication, authorization and charging-related information in a secure manner.

Commands:
  • DER/DEA:  Diameter-EAP-Request/Answer
  • AAR/AAA:  AA-Request/Answer
  • STR/STA:  Session-Termination-Request/Answer
  • ASR/ASA:  Abort-Session-Request/Answer
  • RAR/RAA:  Re-Auth-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


SWd   (Diameter)

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see it   here

specified from  Rel-8  in
TS 23.402, clause 4.4
TS 29.273, clause 6 

This interface connects the 3GPP AAA Proxy, possibly via intermediate networks, to the 3GPP AAA Server.

Commands:
  • DER/DEA:  Diameter-EAP-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


SWm   (Diameter)

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between  ePDG
and  3GPP AAA Server / Proxy

see it   here

specified from  Rel-8  in
TS 23.402, clause 4.4
TS 29.273, clause 7 

This reference point is used for AAA signalling (transport of mobility parameters, tunnel authentication and authorization data). It also includes the MAG-AAA interface functionality, RFC 5779 and Mobile IPv6 NAS-AAA interface functionality, RFC 5447.

Commands:
  • DER/DEA:  Diameter-EAP-Request/Answer
  • AAR/AAA:  AA-Request/Answer
  • STR/STA:  Session-Termination-Request/Answer
  • ASR/ASA:  Abort-Session-Request/Answer
  • RAR/RAA:  Re-Auth-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


SWn

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see it   here

specified from  Rel-8  in
TS 23.402, clause 4.4 

Traffic on this interface for a UE-initiated tunnel has to be forced towards ePDG.


SWu

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between  ePDG
and  UE

see it   here

specified from  Rel-8  in
TS 23.402, clause 4.4 

This interface supports handling of IPSec tunnels. The functionality of SWu includes UE-initiated tunnel establishment, user data packet transmission within the IPSec tunnel and tear down of the tunnel and support for fast update of IPSec tunnels during handover between two untrusted non-3GPP IP accesses.


SWx   (Diameter)

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between  HSS
and  3GPP AAA Server

see it   here

specified from  Rel-8  in
TS 23.402, clause 12
TS 29.273, clause 8 

This reference point is used to authorize the UE and to transport NBM-related mobility parameters when NBM (Network-Based Mobility) is used to establish connectivity to the EPC. It is used to authenticate and authorize the UE when the S2a, S2b or S2c reference points are used to connect to EPC. It is also used to update the HSS with the PDN-GW address information. Additionally, it may be used to retrieve and update other mobility related parameters including static QoS profiles for non-3GPP accesses.

Commands:
  • MAR/MAA:  Multimedia-Authentication-Request/Answer
  • PPR/PPA:  Push-Profile-Request/Answer
  • SAR/SAA:  Server-Assignment-Request/Answer
  • RTR/RTA:  Registration-Termination-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


Sxa   (PFCP)

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between  S-GW-C
and  S-GW-U

see it   here

specified from  Rel-8  in
TS 23.214, clause 4.2
TS 29.244 



Sxb   (PFCP)

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between  P-GW-C
and  P-GW-U

see it   here

specified from  Rel-8  in
TS 23.214, clause 4.2
TS 29.244 



Sxc   (PFCP)

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between  TDF-C
and  TDF-U

see it   here

specified from  Rel-8  in
TS 23.214, clause 4.2
TS 29.244 



Sy   (Diameter)

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between  OCS
and  PCRF / H-PCRF

see it   here

specified from  Rel-11  in
TS 23.203, clause 5.2.9
TS 29.219 

The Sy reference point enables transfer of policy counter status information relating to subscriber spending from OCS to PCRF and supports the following functions:
  • Request for reporting of policy counter status information from PCRF to OCS and subscribe to or unsubscribe from spending limit reports (i.e. notifications of policy counter status changes).
  • Report of policy counter status information upon a PCRF request from OCS to PCRF.
  • Notification of spending limit reports from OCS to PCRF.
  • Cancellation of spending limit reporting from PCRF to OCS.
Since the Sy reference point resides between the PCRF and OCS in the HPLMN, roaming with home routed or visited access as well as non-roaming scenarios are supported in the same manner.

Commands:
  • SLR/SLA:  Spending-Limit-Request/Answer
  • SNR/SNA:  Spending-Status-Notification-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.



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