Availability and cost constrained fast planning of Passive Optical Networks under various survivability policies

摘要

In this paper, we propose a planning heuristic called Locate-ONU-with-Lowest-Availability-Requirement-First (LOWLARF) to compare the coverage capability of three previously proposed survivability policies under these constraints. The heuristic is designed to determine the length of the feeder fiber and to locate each ONU on the appropriate location in order to meet the availability requirements while not violating the budget limit. The heuristic is shown to locate the ONUs within the availability requirements and the budget limit. In the test scenarios, ONUs are assumed to contract the users requesting different availability levels while a pre-specified budget limit is set for each scenario. By our proposed planning heuristic, we compare three survivability schemes under various budget constraints and split ratios within various square regions. We show that the better the availability the less the coverage in terms of total deployed fiber length. Furthermore, we also show that better protection leads to a smaller ONU region while less protection allows to cover a larger region by the ONUs.