Title :
Joint optimization of bit and power loading for power efficient OFDM-PON
Author :
Xiaoxue Gong ; Yejun Liu ; Lei Guo
Author_Institution :
Coll. of Inf. Sci. & Eng., Northeastern Univ., Shenyang, China
Abstract :
Orthogonal Frequency Division Multiplexing Passive Optical Network (OFDM-PON) has been considered as a promising candidate for the next generation access network due to its high spectrum efficiency, flexible resource allocation and natural compatibility with Digital Signal Processing (DSP) implementation. In the OFDM-PON, power efficiency is one of important topics attained extensive attentions because the access network is a main power contributor in the whole infrastructure. The previous works focused on reducing the power consumption of OFDM-PON in the Media Access Control (MAC) layer. In this paper, we investigate the joint optimization of bit and power loading for saving power consumptions in the OFDM-PON from the algorithm level perspective. With the constraints of the total bit rate requirement and the acceptable Bit Error Rate (BER), we aim to minimize the transmitted power of ONUs in the OFDM-PON. We transformed this problem into a mathematic model, and then we proposed an efficient algorithm to jointly optimize the bit and power loading, according to our model. Simulation results demonstrate the performances of our proposed algorithm.
Keywords :
OFDM modulation; energy conservation; error statistics; next generation networks; optical modulation; optimisation; passive optical networks; power consumption; signal processing; telecommunication power management; BER constraint; DSP implementation; OFDM-PON; ONU transmitted power; bit error rate; bit optimization; digital signal processing implementation; flexible resource allocation; next generation access network; optical network unit; orthogonal frequency division multiplexing passive optical network; power consumption; power loading; spectrum efficiency; transmitted power minimization; Bit error rate; Bit rate; Loading; OFDM; Optical fiber dispersion; Optical fibers; Passive optical networks; OFDM-PON; bit and power loading; joint optimization; power efficiency;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2014 13th International Conference on
Conference_Location :
Suzhou
DOI :
10.1109/ICOCN.2014.6987123