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Long Term Evolution (LTE) is the current standard for mobile networks based on Third Generation Partnership Project. LTE includes enhanced multimedia broadcast and multicast services (MBMS), also called as Evolved multimedia broadcast and multicast services (eMBMS) where the same content is transmitted to multiple users in one specific area. eMBMS is a new function defined in 3GPP Release 8 specification that supports the delivery of content and streaming to group users into LTE mobile networks. In LTE an important point of demanding multimedia services is to improve the robustness against packet losses. In this direction, in order to support effective point-to-multipoint download and streaming delivery, 3GPP has included an Application Layer Forward Error Correction (AL-FEC) scheme in the standard eMBMS. The standard AL-FEC system is based on systematic, fountain Raptor codes. Raptor coding is very useful in case of packet loss during transmission as it recover all data back from insufficient data at receiver terminal .In our work, in response to the emergence of an enhanced AL-FEC scheme, a raptor code has been implemented and performance is evaluated and the simulation results are obtained.

PERFORMANCE ANALYSIS OF AL-FEC RAPTOR CODE OVER 3GPP EMBMS NETWORK