Gigabit-capable Passive Optical Network（GPON） system has been standardized in ITU-T Rec.G.984 series.It can provide high-speed optical subscriber networks with broad bandwidth and is getting more popular in access network.But with the continuous increase in higher bandwidth demand applications like IPTV

VOD

HDTV etc

the need for much higher capacity over GPON links is more obvious.In this paper

we propose a method of deploying MAC protocols and a special filter over GPON system to get higher rate of GPON links’ utilization.