DIAMETER

Diameter is a protocol which is used mainly in LTE.






Interfaces:

• S6a : Used between HSS and MME.

This interface implements following procedures .

                  

Procedure	Diameter Message
Location UpdateGPRS	ULR
Cancel Location	CLR
Purge UE	PUR
ISD	IDR
DSD	DSR
Authentication	AIR
Reset	RSR
Notification	NOR

3G HLR to HSS conversion. 

         There is specification where inter working function is defined to connect a 4G HSS to 3G HLR           for a mobile to work in 4G network , which have its profile in 3G HLR.

         

             

  

• Gy: Used between GGSN/PGW and OCS.
• GX : It is used between PCEF (in PGW/GGSN) and PCRF.