In this paper, we design a new virtual queue-based back-pressure scheduling algorithm (VBR) for achieving significant delay reduction in wireless sensor networks (WSN). Our algorithm design comes from an observation that classical back-pressure scheduling algorithm usually needs a long period of time to form a queue backlog-based gradient in a network, which decreases towards the sink in the ne...

In this paper, we present the results of a study priority multi-server queuing system with heterogeneous customers arriving according to marked Markovian arrival process (MMAP), phase-type service times (PH), and queue finite capacity. Priority traffic classes differ in PH distributions time probability joining queue, which depends on current length queue. If is full, customer does not enter sy...

A ~ T ~ U C T he paper analyzes how using a longer memory of the past queue occupancy in computing the average queue occupancy affects the stability and variability of a RED queue. Extensive simulation studies with both persistent and Web TCP sources are used to study the variance of the RED queue as a function of the memory of the averaging process. Our results show that there is very little p...

Active queue management (AQM) algorithms have been proposed to leverage TCP protocol inherent congestion algorithms which usually fail to maintain the queue length to an average level under large or bursting workloads. The main task of AQM algorithms is to detect network congestion at its early stages and start drop packets before the congestion affects the network throughput in a high degree. ...

In this paper, we investigate extensively the joint network dynamics with different AIMD window-adjustment parameters on end-hosts, and different queue management schemes (i.e. DropTail vs. RED) in routers. We reveal that with DropTail buffer, although smooth TCPs causes less queuing-delay jitter, its average queuing delay is significantly higher than that of responsive TCPs. The direct implica...

This paper considers the issue of optimal subcarrier allocation in OFDMA. We show, via a counter example, that water-filling based subcarrier allocation policies, contrary to conventional wisdom, fail to provide rate-stability for an otherwise stabilizable OFDMA system. Water-filling is too myopic when considering long-time average performance, e.g. delay, queue lengths, and even long-run throu...

We study the load balancing system operating under Join Shortest Queue (JSQ) in many-server heavy-traffic regime. If $N$ is number of servers, we let difference between total service rate and arrival be $N^{1-\alpha}$ with $\alpha>0$. show that for $\alpha>4$ average queue length behaves similarly to classical Specifically, prove distribution multiplied by converges an exponential random variab...

Based on establishing the mathematical model of system provided parameters, using discrete-time Markov chain and a function set by non-negative integer random variable as Probabilistic methods, discrete time variable, two-queue different gated polling has been fully analyzed, low- higher-order properties cycle period are deduced, average queue pair length waiting delay for message packets calcu...