Equipment selection heuristics for microwave fixed links

Flood, I. D. and Allen, S. M. ORCID: https://orcid.org/0000-0003-1776-7489 2015. Equipment selection heuristics for microwave fixed links. Radio Science 49 (8) , pp. 630-642. 10.1002/2014RS005484

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Abstract

Microwave fixed links use highly standardized radio equipment and, in the radio equipment standard referenced in this paper, there is a choice between exactly two radio systems when the assigner wishes to resolve a specific data rate exactly: one using a relatively lower-order modulation scheme and one a relatively higher-order scheme. Although the higher-order equipment requires less bandwidth for an isolated link, these systems radiate at higher powers and require larger protection ratios in the radio interference environment which lead to well-established trade-offs between modulation, bandwidth, equivalent isotropic radiated power, and frequency assignment criteria. Our earlier research showed that by extending the Frequency Assignment Problem to include equipment selection and using lower-order modulation equipment on selected links, we can actually reduce the overall span of frequencies required for a network frequency assignment. This work focused on the development of integer programming formulations and analyzed the exact solutions obtained. Exact solutions are impractical for real world problems; hence, here we focus on the development of heuristics for equipment selection. We can model the fixed link network as a complete graph where the vertices represent fixed link frequency assignment requests and the edges represent interference between pairs of vertices. Using a graph theoretic analysis of the interference problem, we propose heuristic techniques and discuss the relative success of our approach in this article.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics Systems Immunity Research Institute (SIURI)
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Uncontrolled Keywords:	Heuristics; Equipment selection; Frequency assignment
Publisher:	American Geophysical Union (AGU)
ISSN:	0048-6604
Date of Acceptance:	21 July 2014
Last Modified:	27 Oct 2022 10:15
URI:	https://orca.cardiff.ac.uk/id/eprint/69494

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