Two schedulers to provide delay proportion and reduce queueing delay simultaneously
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The advanced waiting time priority scheduler (AWTP),modified from the waiting time priority scheduler (WTP),was proposed to achieve proportional delaydifferentiation. AWTP not only achieves more accuratedelay proportion than the WTP scheduler no matter inshort or long timescales, but also greatly reduces theoverall queuing delay when the traffic load is moderate.In this paper, we find that AWTP can not steadily keepthe delay ratio under different traffic load distributionsbecause its scheduling sometimes ignores consideringpacket waiting time. Thus, three remedied algorithms,named Minus-WTP (MWTP), Existing-WTP (EWTP), andCounting-WTP (CWTP), are proposed to resolve thisproblem. All remedies simultaneously consider the packetwaiting time and packet transmission time. Simulationresults reveal that these modifications inherit the merit ofAWTP and actually alleviate this side effect.