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Official FCC Blog

October, 2012

WCB Cost Model Virtual Workshop 2012 - Routing

by Wireline Competition Bureau
October 1, 2012

Please provide comments to the issue below as part of the 2012 WCB cost model virtual workshop for inclusion in the record. Comments are moderated for conformity to the workshop’s guidelines.

Background

Hybrid Cost Proxy Model: The HCPM builds loop plant directly to customer locations via individual micro-grids. At the time the HCPM platform was adopted, micro-grids were hundreds of feet across. This approach allowed for an error of up to a few hundred feet in determining customer locations. The model defines customer "lots" within each micro-grid based on the customer population. The model allows for spanning-tree optimization of routes, although this is recommended only in sparsely populated locations. The feeder network is built on explicit spanning-tree algorithms, with user-defined inputs to select various approaches (e.g., airline v. rectilinear distance, allow artificial junction nodes).

CQBAT: The CQBAT model builds loop plant along road segments. It utilizes a spanning tree algorithm in order to find the optimal route (i.e., the lowest cost route) to serve all customer locations along road paths—a minimum spanning road tree.

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