Physical-Layer-Aware MAC Schemes for Dynamic Subcarrier Assignment in OFDMA-PON Networks

• Published in: Journal of lightwave technology Vol. 30; no. 12; pp. 1915 - 1923
• Main Authors: Kanonakis, K., Giacoumidis, E., Tomkos, I.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 15-06-2012; Institute of Electrical and Electronics Engineers
• Subjects: Access methods and protocols, osi model; Adaptive subcarrier modulation (ASM); Applied sciences; Bandwidth; dynamic subcarrier assignment (DSA); Exact sciences and technology; Information, signal and communications theory; medium access control (MAC); Modulation; Multiplexing; OFDM; Operation, maintenance, reliability; Optical network units; orthogonal frequency-division multiple access (OFDMA); passive optical network (PON); Passive optical networks; Signal and communications theory; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Teleprocessing networks. Isdn; Time division multiple access; Transmission and modulation (techniques and equipments); Wavelength division multiplexing; Access control; Performance evaluation; dynamic subcarrier assignment (DSA); Quadrature amplitude modulation; Frequency division multiple access; Subcarrier; Optimization; Optical fiber network; Adaptive subcarrier modulation (ASM); Dynamic allocation; Cross-layer approach; Security of data; Digital signature; Optical fiber communication; Delay time; passive optical network (PON); Adaptive modulation; Computer simulation; Passive optical network; Algorithm; medium access control (MAC); orthogonal frequency-division multiple access (OFDMA); Time domain method; Orthogonal frequency division multiplexing; Public key cryptography; Service quality
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2012.2187349

In this paper, a medium access control (MAC) framework tailored for orthogonal frequency-division multiple access passive optical networks (OFDMA-PONs) is defined which allows exploiting both the subcarrier and time domains in a dynamic and flexible way. A dynamic subcarrier assignment algorithm that respects quality of service by offering decreased average delay is proposed. Moreover, effective methods to improve its performance and reduce its complexity are provided. Additionally, the proposed PON MAC framework for the first time leverages on a cross-layer optimization via adaptive quadrature amplitude modulation (QAM) per optical network unit (ONU). The performance of all schemes is evaluated using computer simulations.