EPON is very suitable for broadcasting and multicasting services

such as IPTV

thanks to its tree-shaped topological structure and up to 1Gbps bandwidth.This paper focuses on the technological feasibility of offering multicasting services over EPON and makes improvement over the existing scheme by introducing multicasting source control and user authority control from considerations of system security and maintainability

thus improving the efficiency and precision of multicasting control.At the same time

it gives an extended OAM protocol design scheme and presents the control strategies for dynamic and static assignment in accordance with different control patterns

which is verified in experiments.