在光线路终端采用共享正交频分复用（OFDM）调制模块的节能波分复用无源光网络（WDM-OFDM-PON）
Energy-efficient WDM-OFDM-PON employing shared OFDM modulation modules in optical line terminal.
作者信息
Hu Xiaofeng, Zhang Liang, Cao Pan, Wang Kongtao, Su Yikai
机构信息
State Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
出版信息
Opt Express. 2012 Mar 26;20(7):8071-7. doi: 10.1364/OE.20.008071.
We propose and experimentally demonstrate a scheme to improve the energy efficiency of wavelength division multiplexing - orthogonal frequency division multiplexing - passive optical networks (WDM-OFDM-PONs). By using an N × M opto-mechanic switch in optical line terminal (OLT), an OFDM modulation module is shared by several channels to deliver data to multiple users with low traffic demands during non-peak hours of the day, thus greatly reducing the number of operating devices and minimizing the energy consumption of the OLT. An experiment utilizing one OFDM modulation module to serve three optical network units (ONUs) in a WDM-OFDM-PON is performed to verify the feasibility of our proposal. Theoretical analysis and numerical calculation show that the proposed scheme can achieve a saving of 23.6% in the energy consumption of the OFDM modulation modules compared to conventional WDM-OFDM-PON.
我们提出并通过实验证明了一种提高波分复用-正交频分复用-无源光网络（WDM-OFDM-PON）能源效率的方案。通过在光线路终端（OLT）中使用一个N×M光机械开关，一个OFDM调制模块可由多个信道共享，以便在一天中的非高峰时段将数据传送给多个流量需求较低的用户，从而大大减少运行设备的数量，并将OLT的能耗降至最低。进行了一项利用一个OFDM调制模块为WDM-OFDM-PON中的三个光网络单元（ONU）服务的实验，以验证我们方案的可行性。理论分析和数值计算表明，与传统的WDM-OFDM-PON相比，所提出的方案可使OFDM调制模块的能耗节省23.6%。
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