【摘要】 方案使用幅度和相位正交调制的方式来承载单播和组播业务,利用波长选择开关对需要组播业务的ONU(光网络单元)和不需要组播业务的ONU进行分组,进而实现组播业务的传输。整个方案的控制策略完全集中在OLT(光线路终端)一端的WSS中,简化了组播控制的方法,使整个系统简单方便。更多还原

【Abstract】 In this proposed multicast scheme,orthogonal modulation of ASK/DPSK is used to overlay the unicast and multicast services.Wavelength Selective Switch is used to distinguish the multicast-enabled ONUs and multicast-disabled ONUs by different wavelengths,so the multicast service is realized.The control scheme is convenient and centralized at OLT,simplifying the whole system.更多还原