Due to increasing amount of applications that require high bandwidth and high speed, standardization currently being conducted for future PON, named next generation Optical access network State 2 (Next Generation Passive Optical Network 2, NG-PON2). The main requirements for NG-PON2 are: support aggregate rate all the ONUs of 40 Gb/s of internet support of mobile devices (mobile backhaul), offer service of 1 Gb/s or more to users, 40 miles of range, 64 units of ONUs and 40 miles of range differential The Group of full service access network (The Full Service Access Network FSAN Group) considered many architectures of networks to meet the requirements of NG-PON2. Among them, were studied: the Division Multiplexing PON wavelength (Wavelength Division Multiplexing PON, WDM-PON), the Orthogonal Frequency Division Multiplexing PON (Orthogonal Frequency Division Multiplexing PON, OFDM-PON), and multiplexing by wavelength-division and Time PON (Time and Wavelength Division Multiplexed PON, TWDM-PON). Among all the proposals presented, the architectures TWDM-PON was selected by FSAN in April 2012 as first solution for NG-PON2. This technology uses WDM for stacking multiple pairs of wavelengths XG-PONs. As mentioned, the XG-PON offers rate 9.953 Gb/s, 2.488 Gb/s for downstream transmissions and upstream, respectively. Soon, in order to achieve the throughput requirements of NGPON2, It is necessary the system TWDM-PON with at least 4 XG-PONs.
Suggest applications for NGPON2 using TWDM networks-PONs