Dynamic and balanced capacity allocation scheme with uniform bandwidth for OFDM-PON systems
Dynamic and balanced capacity allocation scheme with uniform bandwidth for OFDM-PON systems
复制标题
OFDM-PON系统带宽统一的动态均衡容量分配方案
DOI：
10.1016/j.optcom.2014.09.029
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发表时间：
2015-03-01
影响因子：
2.4
通讯作者：
Xie, Shizhong
中科院分区：
文献类型：
--
作者：
Lei, Cheng;Chen, Hongwei;Xie, Shizhong
随着正交频分复用无源光网络（OFDM-PON）系统比特率的不断提高，如何在数量庞大的光网络单元（ONUS）之间有效地分配系统带宽是OFDM-PON得以实际部署的关键问题之一。与传统的带宽分配方案不同，本文首次考虑了单个ONU的传输性能，并进行了优化。为了降低制造复杂度并充分利用接收机的处理能力，将系统带宽平均分配给ONU。比特负载用于分配总的传输容量，功率负载用于保证ONU在不同比特率下具有均衡的传输性能。通过这种方式，可以实现用于OFDM-PON系统的具有均匀带宽的动态和平衡的容量分配方案。最后，建立了一个实验系统，验证了该方案的可行性，并分析了该方案对整个系统的影响。(C)2014由Elsevier B. V.出版
As the bitrate of orthogonal frequency division multiplexing passive optical network (OFDM-PON) system is continuously increasing, how to effectively allocate the system bandwidth among the huge number of optical network units (ONUS) is one of the key problems before OFDM-PON can be practical deployed. Unlike traditional bandwidth allocation scheme, in this paper, the transmission performance of single ONU is for the first time taken into consideration and optimized. To reduce the manufacturing complexity and fully utilize the processing ability of the receivers, the system bandwidth is equally distributed to the ONUs. Bit loading is used to allocate the total transmission capacity, and power loading is used to guarantee the ONUS have balanced transmission performance even if they operate at different bitrate. In this way, a dynamic and balanced capacity allocation scheme with uniform bandwidth for OFDM-PON systems can be realized. At last, an experimental system is established to verify the feasibility of the proposed scheme, and the influence that the scheme brings to the whole system is also analyzed. (C) 2014 Published by Elsevier B.V.