The interest in solving the issue of congestion or flow control in network established from the first discovery and increase popularity of the Internet in 1967 or earlier. As the use of the network deployed and the popularity increase, the issue grows and the demand for an optimal or tentative solution becomes obvious. Since that time there has been an intensive effort from the scholars and researchers to solve the congestion control problem. The problem get worse by the engagement of novel traffic with different characteristics for application called realtime applications such as video and voice applications. Another cause of this demand is the user himself. The attempt in solving the congestion problem in network layer was popular in 90's. This article will demonstrate chronologically how the attempts toward timestamp based scheduling in the packet-switch network have been evolved. Furthermore, the benefit and the drawbacks of using a mechanism will be presented. Also, a brief explanation of the mathematical, conceptual or implementation issue of a mechanism is given. The key success of the scheduler in the market will be highlighted. This paper will stimulate the research thinking to identify the importance and the ability of scheduling in routers to enhance quality of service (QoS) for real time application over other solution in several layers. In addition it will assist the researcher to distinguish the key failure of other proposed mechanisms which have not been implemented in real routers.

A survey on the chronological evolution of timestamp schedulers in packet switching networks

A self-clocked traffic scheduling algorithm is proposed by modifying the virtual time function in the well known fair queueing algorithm, SCFQ. It can be shown that by this modification, the fairness index and the packets worst case delay will remain bounded and these bound are the same as those of SCFQ. Then, simulation is invoked to show the effectiveness of our modification, by showing improvements in the distribution and average of delay.

LVT-SCFQ: A Modified Self Clocked Fair Queueing Algorithm for Broadband Networks

The pervasiveness of the Internet and its applications lead to the potential increment of the users’ demands for more services with economical prices. The diversity of Internet traffic requires some classification and prioritisation since some traffic deserve much attention with less delay and loss compared to others. Current scheduling mechanisms are exposed to the trade-off between three major properties namely fairness, complexity and protection. Therefore, the question remains about how to improve the fairness and protection with less complex implementation. This research is designed to enhance scheduling mechanism by providing sustainability to the fairness and protection properties with simplicity in implementation; and hence higher service quality particularly for real-time applications. Extra elements are applied to the main fairness equation to improve the fairness property. This research adopts the restricted charge policy which imposes the protection of normal user. In terms of the complexity property, genetic algorithm has an advantage in holding the fitness score of the queue in separate storage space which potentially minimises the complexity of the algorithm. The integrity between conceptual, analytical and experimental approach verifies the efficiency of the proposed mechanism. The proposed mechanism is validated by using the emulation and the validation experiments involve real router flow data. The results of the evaluation showed fair bandwidth distribution similar to the popular Weighted Fair Queuing (WFQ) mechanism. Furthermore, better protection was exhibited in the results compared with the WFQ and two other scheduling mechanisms. The complexity of the proposed mechanism reached O(log(n)) which is considered as potentially low. Furthermore, this mechanism is limited to the wired networks and hence future works could improve the mechanism to be adopted in mobile ad-hoc networks or any other wireless networks. Moreover, more improvements could be applied to the proposed mechanism to enhance its deployment in the virtual circuits switching network such as the asynchronous transfer mode networks.

Just Queuing: Policy-Based Scheduling Mechanism for Packet Switching Networks

In this paper we analytically propose an alternative approach to achieve better fairness in scheduling mechanisms which could provide better quality of service particularly for real time application. Our proposal oppose the allocation of the bandwidth which adopted by all previous scheduling mechanism. It rather adopt the opposition approach be proposing the notion of Maxmin-charge which fairly distribute the congestion. Furthermore, analytical proposition of novel mechanism named as Just Queueing is been demonstrated.

Breaking the Legend: Maxmin Fairness notion is no longer effective

In this paper we analytically propose an alternative approach to achieve better fairness in scheduling mechanisms which could provide better quality of service particularly for real time application. Our proposal
oppose the allocation of the bandwidth which adopted by all previous scheduling mechanism. It rather adopt the
opposition approach be proposing the notion of Maxmin-charge which fairly distribute the congestion. Furthermore, analytical proposition of novel mechanism named as Just Queueing is been demonstrated.

/pdf/breaking-the-legend-maxmin-fairness-notion-is-no-longer-1k40liwfvw.pdf

A traffic scheduling algorithm based on the RPS model called FPFQ is proposed. In FPFQ, the result of finishing potentials sorting algorithm is used for recalibration of the system potential function. This reduces the system potential function complexity to O(1) while its fairness index is still comparable to that of SFPQ and WFQ. Analytical methods are invoked to show the effectiveness of FPFQ in terms of Delay bound and fairness index.

FPFQ: A Low Complexity Fair Queueing Algorithm for Broadband Networks

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FPFQ: A Low Complexity Fair Queueing Algorithm for Broadband Networks