Congestion Control of Di®erentiated ServiceNetwork
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Graphical Abstract
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Abstract
The real application of Di®erentiated ser-
vices (Di®Serv) network requires the Di®Serv routers
to support di®erent data rates and time delays for the
subscribers with di®erent priorities. However, classical
routers and AQM algorithms for the routers can not meet
the requirements. To solve the problems, this paper de-
velops the schemes of Di®Serv edge router (DER) and
Di®Serv core router (DCR) with multiqueues, classi¯er
and scheduler and a Di®Serv AQM algorithm. The pro-
posed Di®Serv AQM algorithm based on DER can process
the heterogeneous and classi¯ed tra±c °ows. The Di®-
Serv AQM algorithm is derived from two theorems about
the congestion conditions of Di®Serv network in di®erent
links, it can prevent the possible congestion and ensure the
data rates and time delays for the subscribers with higher
priorities. The system simulations validate the proposed
Di®Serv routers and Di®Serv AQM algorithm.
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