Pushing the limits of copper: Paving the road to FTTH
Pushing the limits of copper: Paving the road to FTTH
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突破铜缆的极限：为 FTTH 铺平道路
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
M. Timmers
中科院分区：
文献类型：
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作者：
J. Maes;M. Guenach;K. Hooghe;M. Timmers
对更高数据速率的不断增长的需求正在将现有的使用同轴电缆或双绞线电缆的电气宽带通信系统推向极限。虽然光接入系统本身具有更高的传输容量，但将接入网络完全升级为光纤仍然是一项昂贵且耗时的工作。因此，许多运营商逐渐将光纤部署到更靠近最终用户的地方，同时通过VDSL 2等铜缆技术桥接剩余的距离。在这一发展道路的下一步，光纤将被带到距离最终用户不超过200米的分布点，采用称为G.在剩余的铜线上快速传输500 Mb/s至1 Gb/s的数据速率。本文对G.目前正在ITU标准化的快速技术。我们展示了其主要技术要求的可行性，即：i）通过客户端调制解调器为接入设备供电，ii）短铜环上正交频分复用的高传输效率，iii）为最终用户提供高净数据速率。
The ever growing demand for higher data rate is pushing existing electrical broadband communication systems, using coax or twisted pair cabling, to the limit. While optical access systems inherently have a much higher transmission capacity, upgrading the access network entirely to fiber remains a costly and time-consuming effort. Therefore, many operators deploy fiber gradually closer to the end user, while bridging the remaining distance through copper technologies such as VDSL2. In the next step of this evolutionary path, fiber is brought to distribution points that are in the range of no more than 200 m from the end user, with a copper access technology called G. fast delivering data rates of 500 Mb/s to 1 Gb/s over the remaining copper stretch. In this paper, we give an overview of the G. fast technology that is currently being standardized in ITU. We show the feasibility of its main technical requirements, namely i) powering of the access equipment through the customer premises modem, ii) high transmission efficiency for orthogonal frequency division multiplexing over short copper loops and iii) offering high net data rates to end users.