There are several contributions of this paper. First of all, FQ algorithm provides low delay to sources which use less than their fair share of bandwidth. Furthermore, their algorithm also targets the problems caused by ill-behaved sources. With FCFS, ill-behaved sources may cause serious problems causing other flows almost shut out. However, with FQ they obtain their fair share of bandwidth. This property also makes FQ gateways to be considered as a kind of firewalls that protect users and rest of the network from ill-behaved sources.
Although this initial FQ algorithm provides a mean fairness to users, it may not provide complete fairness in today’s complex network conditions. This is because initial FQ algorithm only tries to achieve fair allocation of bandwidth but there are several other things shared by users/flows such as links, buffers, CPUs etc. Therefore, in order to provide overall fairness other factors also should be considered. Also this algorithm may not perform well for wireless system where underlying output link conditions may vary frequently.