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3GPP Glossaries:  Interfaces / Reference Points

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|  Za  |  Zb  |  Zh  |  Zh'  |  Zn  |  Zpn  |

 

Za

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between  SEG
and  SEG

see it   here

specified from  Rel-5  in
TS 33.210, clause 5.6 

The Za interface covers all NDS/IP traffic between security domains. On the Za interface, authentication/integrity protection is mandatory and encryption is recommended. ESP shall be used for providing authentication/integrity protection and encryption. The SEGs use IKEv2 to negotiate, establish and maintain a secure ESP tunnel between them. The tunnel is subsequently used for forwarding NDS/IP traffic between security domain A and security domain B. Inter-SEG tunnels can be available at all times, but they can also be established as needed.


Zb

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between  SEG / NE
and  NE

see it   here

specified from  Rel-5  in
TS 33.210, clause 5.6 

The Zb interface is located between SEGs and NEs and between NEs within the same security domain. The Zb interface is optional for implementation. If implemented, it shall implement ESP in tunnel mode and IKE. The support of ESP in Transport mode is optional. On the Zb interface, ESP shall always be used with authentication/integrity protection. The use of encryption is optional. The ESP Security Association shall be used for all control plane traffic that needs security protection.


Zh   (Diameter)

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between  BSF
and  HSS

see it   here

specified from  Rel-6  in
TS 33.220, clause 4.3
TS 29.109 

This reference point allows the BSF to fetch the required authentication information and all GBA user security settings from the HSS.

Commands:
  • DAR/DAA:  Multimedia-Auth-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


Zh'

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between  BSF
and  HLR

specified from  Rel-6  in
TS 33.220, clause 4.3 

The reference point Zh' used between the BSF and the HLR allows the BSF to fetch the required authentication information. The reference point Zh' is an intra-operator domain interface.


Zn   (Diameter)

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between  BSF
and  NAF

see it   here

specified from  Rel-6  in
TS 33.220, clause 4.3
TS 29.109 

This reference point is used by the NAF to fetch the key material agreed during a previous HTTP Digest AKA protocol run over the reference point Ub from the UE to the BSF. It is also used to fetch application-specific user security settings from the BSF, if requested by the NAF.

Commands:
  • BIR/BIA:  Boostrapping-Info-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


Zpn   (Diameter)

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between  BSF
and  NAF

see it   here

specified from  Rel-8  in
TS 33.223
TS 29.109 

The Zpn reference point is introduced with the GBA Push functionality. It is based on the Zn reference point protocols. The NAF receives the GBA-Push-Info intended for the UE from the BSF over the Zpn reference point and forwards it over Upa.

Commands:
  • GPR/GPI:  GBAPush-Info-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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