Congestion control

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    Modulates traffic entry into a telecommunications network in order to avoid congestive collapse resulting from oversubscription. 

    Classification of congestion control algorithms

    Among the ways to classify congestion control algorithms are:

    • By type and amount of feedback received from the network: Loss; delay; single-bit or multi-bit explicit signals
    • By incremental deployability: Only sender needs modification; sender and receiver need modification; only router needs modification; sender, receiver and routers need modification.
    • By performance aspect: high bandwidth-delay product networks; lossy links; fairness; advantage to short flows; variable-rate links
    • By fairness criterion: max-min, proportional, “minimum potential delay