Research and implementation of TFT in EPS system

This paper presents a method of TFT storage and matching based on EPS bearer. The PF filter were stored in the bearer information unit according to the corresponding bearer identification t. At the same time in order to realize the IP packet data matching based on PF priority, we establish the PF information table in accordance with the priority of PF. Using PF information table can quickly locate the PF storage location and complete the IP packet matching. The PF storage according to the bearer identification and PF ID, TFT storage and modified completed in the corresponding bearer, avoid amount of work of sequential query, save the PF maintenance overhead.