In wireless environment, the periodic moments of wireless networks may cause the fluctuation of available bandwidth by varying with time and location. The periodic fluctuation disturbs the resource distribution and Quality of Service (QoS). Qos design is the fundamental functionality of the networking router to enable differentiated delivery and to guarantee the delivery quality for different s...

In this paper, we investigate four methods that yield mathematical measures to analyze the precision of surfaces of manufactured parts. These four methods, namely the au-tocorrelation function, the Fourier spectrum, the Karhunen-Lo eve expansion, and a fractal-wavelet representation, are applied to surfaces produced from grinding processes. The rst two methods are standard methods used in the s...

The distribution of quality characteristic of a product is usually assumed to be known. In some situation, the quality characteristic of a product cannot be measured directly. It needs to be measured by controlling another factor. Wen and Mergen (1999) presented a method for determining the optimum process mean in order to minimize the expected total loss of a product. However, they have not co...

The asynchronous transfer mode (ATM) technique provides a flexible and effective scheme to transport traffic generated by a variety of services with different quality of service (QOS) requirements. To fully utilize network resources while still providing satisfactory QOS to all network users, prioritizing different traffic according to their service requirement becomes necessary. During the cal...

ABSTRACT In this paper, we describe our proposed adaptive deficit-based scheduler for IEEE 802.16e networks working in TDD mode. The scheduler comprised of deficit-based priority queue with adaptive quantum to support variable rate data in both downlink and uplink directions. A Minimum Tolerable Traffic Rate, a QoS parameter defined by the standard is used to guarantee minimum service provided ...

In this paper, we suggested an algorithm to guarantee QoS (Quality of Service) and provide priority for users in 1xEV-DO systems. On forward link, a selected user is served in a TDM fashion with full base station power. The transmission rate depends on the forward link channel quality of each access terminal, which is reported by DRC channel. 1xEV-DO systems adopted an efficient scheduling algo...

When different type of packets with different needs of Quality of Service (QoS) requirements share the same network resources, it became important to use queue management and scheduling schemes in order to maintain perceived quality at the end users at an acceptable level. Many schemes have been studied in the literature, these schemes use time priority (to maintain QoS for Real Time (RT) packe...

In most real world systems, objects vastly outnumbers threads. This paper shows how this characteristic can be used to implement efficient JavaTMmonitors in a way that reduces the number of needed monitors to be equal to the number of threads, while fulfilling the JavaTMsynchronized semantics. Some additional benefits related to priority inheritance and hierarchical resource locking will also b...

A top down development is presented of a distributed priority queue. The crucial characteristic that enables this development is the compositionality of the formalism used. Actually we argue that a stronger requirement is needed which combines compositionality with the ability to adapt given specifications, called modularity.

Taguchi methods provide a comprehensive methodology for quality improvement. The objective is based on a robust design and involves conducting experiments using orthogonal arrays and the estimation factor levels combination that optimizes a given performance measure, typically a Signal-to-Noise ratio. The problem is more complex in the case of multiple responses since the combinations of factor...