Implementation of Decoders for LTE Interface Messages

Long-term evolution is the next-generation network beyond 3G. In order to initiatively imitate and improve network performance, by research and analysis of signaling message which is transmitted in the LTE network architecture, a decoder module is needed. In this paper, the decoding modules for decoding S3, S4, S5/S8, S10 and S11 interfaces, which use GTPv2 protocol to transmit the messages between the various entities such as SGSN - MME, SGSN - SGW, SGW - PGW, MME - MME, MME - SGW and MME - EIR, respectively are explained. Further, in LTE architecture, there is another interface S1MME which uses S1AP protocol between the eNB and MME entities, in similar way interfaces S13 (MME to EIR), S6a (MME to HSS), Gx (PCRF to PCEF), and SGi (between PGW & PDN) which uses diameter protocol, need to be decoded. Hence, to incorporate the decoding of message fields of above said interfaces in the proposed system, the existing Alcatel-Lucent framework LTEPA is enhanced as the project work.