AQM (Active Queue Management) mechanisms support an end-to-end congestion control mechanism of TCP (Transmission Control Protocol). Researchers have claimed several advantages of AQM mechanisms over a conventional Drop-Tail gateway such as the small average queue length (i.e., the number of packets in the buffer). Several AQM mechanisms have been recently proposed and studied by many researcher...

The present investigation deals with the bulk arrival M/G/1 retrial queue with impatient customers and modified vacation policy. The incoming customers join the virtual pool of customers called orbit if they find the server being busy, on vacation or in broken down state otherwise the service of the customer at the head of the batch is started by the server. The service is provided in k</em...

This paper gives a new method to derive the time average distribution of queue length in the model M/G/1 with many vacation rules. We extract many kinds of regenerative cycles of the well-known regenerative processes from the queue length process of the model by using the method shown by Fuhrmann and Cooper. The time average of the original model is represented by the combination of the time av...

AODV is a prominent routing protocol for MANET that uses hop count as a path selection metric. However, AODV has no means to convey traffic load on current route. This study focuses on introducing a new metric, Aggregate Interface Queue Length (AIQL), in AODV in order to deal with load balancing issues. Performance evaluation through simulation shows that the modified code can perform better th...

On the basis of establishing mathematical model and defining the parameters and treating embedded Markov chains and probability generating function as math tools, the paper analyzed discrete-time, nonsymmetric dual-threshold service queue system precisely, and it derived first order and second order characteristics of the system. The paper calculates the average queue length and average waiting...

In recent years, AQM (Active Queue Management) mechanisms, which support the end-to-end congestion control mechanism of TCP (Transmission Control Protocol), have been widely studied. The AQM mechanism is a congestion control mechanism at a router to control its queue length by actively discarding arriving packets. Many AQM mechanisms such as RED (Random Early Detection) have been proposed. Howe...

For the case of HME-based controllers, we see that queue length increases to a large peak at the initial stage, followed by a transient period of less than optimum link utilisation. This corresponds to the period before HME has learnt, because we h a ve used random initial weights for the HME. In actual applications, the combination of both on-line and o-line training may be necessary. The init...

Recently, several gateway-based congestion control mechanisms have been proposed to support the endto-end congestion control mechanism of TCP (Transmission Control Protocol). In this paper, we focus on RED (Random Early Detection), which is a promising gateway-based congestion control mechanism. RED randomly drops an arriving packet with a probability proportional to its average queue length (i...

Performance of the Adaptive RED scheme is susceptible to bursty web traffic. A parallel queue structure was proposed earlier to address this problem, where real time connections (such as web and UDP) and non-real time connections (such as FTP) are served in two different queues with droptail and Adaptive RED policies, respectively. In this paper a modified Adaptive RED scheme is proposed for th...