一种新型混合WDM/TDM的无源光网络系统研究

在接入网中,用户数远多于波长数,因而波长资源非常宝贵,为此提出了波长共享WDMPON系统结构及其媒质接入控制协议分析模型,研究了控制信道接入的要求。最后提出一种接入方案,该方案采用先到先服务的调度策略,控制信道随机接入。该方案实现简单,并能有效地安排传输。理论分析表明,在网络轻载时具有良好的分组延时特性。该方案不仅增加了系统容量,而且能够容纳更多的光网络单元(ONU),便于光接入网从FTTC,FTTB向FTTH发展。

Research on a novel hybrid WDM/TDM passive optical network architecture

Subscribers are more than available wavelengths in access network, and thus wavelength resource is valuable. A novel hybrid WDM/TDM optical access network architecture called wavelength shared WDM PON and its media access control mode are proposed. At last, an access scheme is presented. This scheme adopts the scheduling policy of "first come, first served", and the control channel is accessed at random. It can arrange the transmission effectively. Theoretical analysis shows that it has the character of packet transfer delay when the networks with light loads. The scheme increases system capability and contains more optical network units (ONUs), which promotes optical access network to evolve from FTTC or FTTB into FTTH.