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3GPP Glossaries:  Interfaces / Reference Points

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|  M1  |  M2  |  M3  |  Ma  |  Mb  |  MB2  |  Mc  |  MCData‑DS‑1  |  MCData‑DS‑2  |  MCData‑DS‑3  |  MCData‑FD‑1  |  MCData‑FD‑2  |  MCData‑FD‑3  |  MCData‑FD‑4  |  MCData‑SDS‑1  |  MCData‑SDS‑2  |  MCData‑SDS‑3  |  MCPTT‑1  |  MCPTT‑2  |  MCPTT‑3  |  MCPTT‑4  |  MCPTT‑5  |  MCPTT‑6  |  MCPTT‑7  |  MCPTT‑8  |  MCPTT‑9  |  MCVideo‑1  |  MCVideo‑2  |  MCVideo‑3  |  MCVideo‑4  |  MCVideo‑5  |  MCVideo‑6  |  MCVideo‑7  |  MCVideo‑8  |  MCVideo‑9  |  Mg  |  Mi  |  Mj  |  Mk  |  Ml  |  Mm  |  Mn  |  Mp  |  Mr  |  Mr'  |  Mx  |  Mw  |  Mz  |

 

M1   (GTPv1-U)

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between  MBMS-GW
and  E-UTRAN / UTRAN

see it   here

specified from  Rel-9  in
TS 23.246, clause 4.3.3
TS 29.281
TS 36.300, clause 15.7a
TS 36.445 

This reference point is used between MBMS-GW and E-UTRAN/UTRAN for MBMS data delivery using IP Multicast.


M2   (M2AP)

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between  MCE
and  eNodeB

see it   here

specified from  Rel-9  in
TS 23.246, clause 4.3.3
TS 36.300, clause 15.8
TS 36.443 

This reference point is used to exchange signalling between MCE and eNodeB for MBMS Session Control.


M3   (M3AP)

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between  MME
and  MCE

see it   here

specified from  Rel-9  in
TS 23.246, clause 4.3.3
TS 36.300, clause 15.9
TS 36.444 

This reference point is used to exchange signalling between MME and MCE for MBMS Session Control.


Ma   (SIP)

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between  I-CSCF
and  AS

see it   here

specified from  Rel-8  in
TS 23.228, clause 4.2.4c 

The Interrogating-CSCF to AS reference point is used to:
  • forward SIP requests destined to a Public Service Identity hosted by an Application Server directly to the Application Server;
  • originate a session on behalf of a user or Public Service Identity, if the AS has no knowledge of a S‑CSCF assigned to that user or Public Service Identity.


Mb   (user data)

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between  IMS
and  IPv6 networks

see it   here

specified from  Rel-6  in
TS 29.162 

Via the Mb reference point IPv6 network services are accessed. These IPv6 network services are used for user data transport. Note, that GPRS provides IPv6 network services to the UE, i.e. the GPRS Gi reference point and the IMS Mb reference point may be the same.


MB2   (Diameter)

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between  GCS AS
and  BM-SC

see it   here

specified from  Rel-12  in
TS 23.468, clause 4.3.2.2
clause 5.1
TS 29.468 

The MB2 reference point provides the ability for the application to:
  • Request the allocation/deallocation of a set of TMGIs,
  • Request to activate, deactivate, and modify an MBMS bearer.
The MB2 reference point provides the ability for the BM-SC to:
  • Notify the application of the status of an MBMS bearer.
Commands:
  • GAR/GAA:  GCS-Action-Request/Answer
  • GNR/GNA:  GCS-Notification-Request/Answer
See also  RFC 6733  for Diameter Base Protocol, and  TS 29.230  for 3GPP-specific Diameter codes and identifiers.


Mc   (H.248)

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between  (G)MSC Server
and  CS-MGW

see it   here

specified from  Rel-4  in
TS 29.232 

The Mc reference point describes the interfaces between the MSC Server and CS-MGW, and between the GMSC Server and CS-MGW.



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