Request-based Dynamic Bandwidth Allocation of Gigabit Passive Optical Network

Chih-Ta Chiu, Yung-Chung Wang

Department of Electrical Engineering, National Taipei University of Technology, Taipei, Chinese Taipei.

DOI: 10.4236/opj.2013.32B040                

Abstract

We propose request-based dynamic bandwidth allocation (DBA) of gigabit passive optical network (GPON). The optical line terminal (OLT) in GPON grants bandwidth to optical network units (ONUs). ONUs report request bandwidth which depends on queue lengths of traffic containers (TCONTs) to the OLT. In the OLT, DBA of GPON supports a request-based polling order to allocate bandwidth. Our request-based dynamic bandwidth allocation focuses on weight assignments in the request-based polling order. Weight assignments allocate bandwidth in proportion to guaranteed and request bandwidth. We use the C program to simulate results. Simulated results indicate improved performance in queueing delay when total offered loads are or are not shared uniformly to TCONTs.

Keywords

GPON; DBA; Weight; Polling

Conflicts of Interest

The authors declare no conflicts of interest.

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