top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

How does PGW differentiate incoming data for different UE's in lte ?

+2 votes
250 views

PGW uses TFT's to differentiate the incoming data but if anyone explains more indepth it will be helpful.

posted Feb 11, 2015 by Kishore Kumar Ponukumati

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

For incoming data the task if to find out the right bearer for which on GTP-U traffic TFT is applied, once we get the TFT number/id we redirect the GTP traffic based on the TFT-GTPtunnel mapping.

TFT consists of following parameter (few or all will be used to get the TFT info depends on the configuration)
• Source address (with subnet mask)
• IP protocol number (TCP, UDP)
• Destination port range
• Source port range
• IPSec Security Parameter Index (SPI)
• Type of Service (TOS) (IPv4)
• Flow-Label (IPv6 only)

Check the following articles -
http://tech.queryhome.com/32284/traffic-flow-template-tft-in-lte
http://tech.queryhome.com/43734/quality-of-service-in-lte-full-explained

answer Feb 11, 2015 by Salil Agrawal
Thanks for answer :)
Similar Questions
+2 votes

How P GW will select the S GW for Incoming Packet?
Consider two conditions
1. UE is in idle mode.
2. UE is in ECM CONNECTED and ECM IDLE.

0 votes

As per LTE core network architecture, MME shares S11 interface with SGW and SGW has S5/S8 interface with PGW.
I went through Create Session Response message sent by SGW to MME and found PGW-C and PGW-U tunnel ids.
I want to know what MME does with these PGW-C and PGW-U tunnel Ids ?

+5 votes

Why we need SGW and PGW separately?
If it is for roaming then how it will be used at roaming condition?

...