buildRoutingMatrix: Build routing matrix from table of link relationships

In networkTomography: Tools for network tomography

Description

Constructs routing matrix from link relationships. Determines routes using (weighted) shortest-path calculation (mirroring OSPF). Currently handles tied paths arbitrarily; will incorporate fractions for tie resolution in next version. Can optionally include aggregate source and destination flows for each node; this can make a major difference for some topologies. Tomogravity methods typically make use of such information, which most routers collect. Note that resulting routing matrix need not be of full row rank.

Usage

buildRoutingMatrix(nodes, src, dest, weights = NULL, agg = FALSE,
  sep = "_", aggChar = "*", verbose = 0)

Arguments

nodes	vector (lenght n) of node identifiers
src	vector (length m) of sources, one per link, matched with dest
dest	vector (length n) of destination identifiers, one per link, matched with src
weights	numeric vector (length m) of weights for each link; used in shortest-path routing calculations (roughly OSPF)
agg	logical for whether to include aggregate source and destination flows for each node
sep	character separator between node id's for link and OD names
aggChar	character to indicate aggregate flows; should be distinct from sep
verbose	integer level of verbosity; 0 is silent, >=1 are increasing levels of reporting

Value

List consisting of routing matrix A (dense) of dimensions m x n and iGraph object for network topo

networkTomography documentation built on May 2, 2019, 3:28 a.m.