UMTS LTE Interfaces - Part 2

S5 - Interface between Serving GW and PDN GW.
Functionality
1. User plane tunneling and tunnel management.
2. It is used for Serving GW relocation due to UE mobility or connections to a non-collocated PDN GW.
 
S6a - Interface between HSS and MME
Functionality
1. Enables transfer of subscription and authentication data. Required for evolved system -AAA interface.

Gx- Interface between VPCRF and PCEF in PDN GW.
Functionality: Transfer of (QoS) policy and charging rules.
 
S8 - Interface between
Serving GW in the VPLMN and the PDN GW in the HPLMN.
Functionality
Inter-PLMN reference point providing user and control plane between the Serving GW in the VPLMN and the PDN GW in the HPLMN.
 

LTE - 4G Wireless Technology

Digital fundamentals.

Interview Questions.

Tutorials @fullchipdesign.com

Verilog Tutorial.

LTE Tutorial.

Memory Tutorial.

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