Abstract-Energy consumption of customer premises equipment (CPE) in the new generation of time-division multiplexing (TDM) passive optical networks (PON) operating at 10 Gb/s, has become a serious problem both in terms of the global network energy consumption and the CPE battery life. The proposed low energy passive optical network (PON), based on a novel bitinterleaving downstream protocol, reduces the protocol processing energy by a factor of 30 and enables a significant reduction in the total CPE energy consumption over the standard 10 Gb/s PON CPE. The network architecture, protocol and the key enabling techniques for its implementation, including dynamic traffic interleaving, rate-adaptive descrambling of decimated traffic and downsampling clock and data recovery (CDR) circuit, are described. Detailed analysis of the CPE energy consumption and comparison with the standard PON CPE is also included in the paper.
Performance results are presented for digital subscriber line (DSL) of signal-to-noise ratio (SNR) and achievable bit rates under the very high speed digital subscriber line 2 (VDSL2) standard [1][2][3][4][5][6][7]. We investigate the impact of various key factors, such as the number of lines, line lengths, frequency range, choice of precoder, channel measurement accuracy, and implementation accuracy (quantization errors).
PreliminariesThe following sections describe the problem and the data used for our performance analysis.
SNR and CrosstalkWe focus on VDSL2-standard parameter values and systems with VDSL2-12a and VDSL2-17a profiles [5]. We consider wires having diameters 0.5 mm, American wire gauge (AWG) 24. We further focus on the downstream and L ϭ 4 or L ϭ 6 lines.
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