4G/LTE - Traffic Flow

TFT (Traffic Flow Template)

TFT is a set of information structure that is used to map a Service Data Flows to a specific Radio Bearer. The high level view of the relationship between TFT and Radio Bearer is well illustrated as shown below in the WhitePaper :  The LTE Network Architecture (A Comprehensive Tutorial) - Alcatel Lucent

Overall structure of NAS message for TFT setting is as shown below. (This is an example case for specifying TFT to map a service data flow to a specific port. The structure of Packet Filter Component IE would vary depending on what you select in Packet Filter Component Type Identifier)

For the details of each of these parameters, refer to 24.008 10.5.6.12 Traffic Flow Template.