This module implements a distributed dual-gradient based algorithm, for adapting the demand injected traffic (congestion control) in the network, to maximize the network utility enforcing a fair allocation of the resources.
Ths event processor is adapted to permit observing the algorithm performances under user-defined conditions,
including asynchronous distributed executions, where signaling can be affected by losses and/or delays, and/or measurement errors.
The time evolution of different metrics can be stored in output files, for later processing.
As an example, see the fig_sec10_4_congestionControlDual.m MATLAB file used for generating the graph/s of the case study in the
book using this algorithm.
To simulate a network with this module, use the Online_evGen_doNothing generator.
signaling_isSynchronous: Boolean type (default: false). true if all the distributed agents involved wake up synchronously to send the signaling messages
signaling_averageInterMessageTime: Default: 1.0 Average time between two signaling messages sent by an agent
signaling_maxFluctuationInterMessageTime: Default: 0.5 Max fluctuation in time between two signaling messages sent by an agent
signaling_averageDelay: Default: 0.0 Average time between signaling message transmission by an agent and its reception by other or others
signaling_maxFluctuationInDelay: Default: 0.0 Max fluctuation in time in the signaling delay, in absolute time values. The signaling delays are sampled from a uniform distribution within the given interval
signaling_signalingLossProbability: Default: 0.05 Probability that a signaling message transmitted is lost (not received by other or others involved agents)
update_isSynchronous: Boolean type (default: false). true if all the distributed agents involved wake up synchronousely to update its state
update_averageInterUpdateTime: Default: 1.0 Average time between two updates of an agent
update_maxFluctuationInterUpdateTime: Default: 0.5 Max fluctuation in time in the update interval of an agent, in absolute time values. The update intervals are sampled from a uniform distribution within the given interval
gradient_gammaStep: Default: 1.0E-4 Gamma step in the gradient algorithm
gradient_maxGradientAbsoluteNoise: Default: 0.0 Max value of the added noise to the gradient coordinate in absolute values
simulation_maxNumberOfUpdateIntervals: Default: 700.0 Maximum number of update intervals in average per agent
simulation_randomSeed: Default: 1 Seed of the random number generator
simulation_outFileNameRoot: Default: congestionControlDual Root of the file name to be used in the output files. If blank, no output
control_minHd: Default: 0.1 Minimum traffic assigned to each demand
control_maxHd: Default: 1000000.0 Maximum traffic assigned to each demand
control_fairnessFactor: Default: 2.0 Fairness factor in utility function of congestion control
control_initialLinkPrices: Default: 1.0 Initial value of the link weights