Energy-efficient optical line terminal for WDM-OFDM-PON based on two-dimensional subcarrier and layer allocation.
Energy-efficient optical line terminal for WDM-OFDM-PON based on two-dimensional subcarrier and layer allocation.
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DOI：
10.1364/oe.20.025284
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发表时间：
2012-11
期刊：
影响因子：
3.8
通讯作者：
Xiaofeng Hu;Pan Cao;Zhiming Zhuang;Liang Zhang;Qi Yang;Yikai Su
中科院分区：
文献类型：
--
作者：
Xiaofeng Hu;Pan Cao;Zhiming Zhuang;Liang Zhang;Qi Yang;Yikai Su
提出并实验验证了一种在波分复用-正交频分复用-无源光网络（WDM-OFDM-脑桥）中降低光线路终端（奥尔特）能耗的方案。在我们的方案中，无线通信技术，称为分层调制，被引入到最大限度地提高传输容量的OFDM调制模块在奥尔特中的多路复用数据从不同的ONU组的信噪比（SNR）的利润到相同的子载波。通过自适应的动态子载波和层分配，多个业务需求较低的ONU组可以共享一个OFDM调制模块，在一天中的非高峰时段传输数据，从而大大减少了运行设备的数量，并最大限度地降低了奥尔特的能耗。数值计算表明，与传统的WDM-OFDM-PON相比，采用该方案可以使奥尔特的能量效率提高28.3%。
We propose and experimentally demonstrate a scheme to reduce the energy consumption of optical line terminal (OLT) in wavelength division multiplexing - orthogonal frequency division multiplexing - passive optical networks (WDM-OFDM-PONs). In our scheme, a wireless communication technique, termed layered modulation, is introduced to maximize the transmission capacity of OFDM modulation module in the OLT by multiplexing data from different ONU groups with signal-to-noise ratio (SNR) margins onto the same subcarriers. With adaptive and dynamic subcarrier and layer allocation, several ONU groups with low traffic demands can share one OFDM modulation module to deliver their data during non-peak hours of a day, thus greatly reducing the number of running devices and minimizing the energy consumption of the OLT. Numerical calculation shows that an energy efficiency improvement of 28.3% in the OLT can be achieved by using proposed scheme compared to the conventional WDM-OFDM-PON.