The purpose of this paper is to analyze the effect of a particular control doctrine applied to the service mechanism of a queuing process with lapse. It is assumed that the service discipline is FCFS (first come, first served), arrival process is Poisson, service time distribution is exponential, service process is one phase and the capacity is infinite. It is also assumed that the customer may...

We study how to estimate real time queue lengths at signalized intersections using intersection travel times collected from mobile traffic sensors. The estimation is based on the observation that critical pattern changes of intersection travel times or delays, such as the discontinuities (i.e., sudden and dramatic increases in travel times) and non-smoothness (i.e., changes of slopes of travel ...

ACK filtering has been proposed as a technique to alleviate the congestion at the input of a slow channel located on the reverse path of a TCP connection. Old ACKs waiting at the input of the slow channel are erased when new ACKs are to be queued. In the literature the case of one-ACK per connection at a time has been studied. In this paper we show that this latter scheme is too aggressive for ...

This paper considers MAP/G/1 queueing systems under the following two situations: (1) At the end of a busy period, the server is turned off and inspects the queue length every time a customer a,rrives. When the queue length reaches a pre-specified value N , the server turns on and serves customers continuously until the system becomes empty. (2) At the end of a busy period, the server takes a s...

—Due to the difficulty in discriminating the wireless loss from congestion loss in heterogeneous networks, TCP Westwood can not accurately estimate the available bandwidth, and cause low network utilization. In this paper, we propose an improved congestion control algorithm called TCP NewBR, which adaptively estimates bandwidth by using the bottleneck link utilization, and selects more precise...

The performance and power optimization of dynamic superscalar microprocessors requires striking a careful balance between exploiting parallelism and hardware simplification. Hardware structures which are needlessly complex may exacerbate critical timing paths and dissipate extra power. One such structure requiring careful design is the issue queue. In a Simultaneous Multi-Threading (SMT) proces...

Adaptive traffic signal control, which adjusts traffic signal timing according to real-time traffic, has been shown to be an effective method to reduce traffic congestion. Available works on adaptive traffic signal control make responsive traffic signal control decisions based on human-crafted features (e.g. vehicle queue length). However, human-crafted features are abstractions of raw traffic ...

We examine two extensions of traditional single-node packet-scale queueing models: tandem networks and (strict) priority systems. Two generic input processes are considered: periodic and Poisson arrivals. For the two-node tandem, an exact expression is derived for the joint distribution of the total queue length, and the queue length of the first queue, implicitly determining the distribution o...