Wavelength routed all-optical networks require that continuous wavelengths be established from source to destination nodes if no wavelength converters exist in the network. The requests to establish these lightpaths can be blocked, depending on the availability of the wavelengths. It has been discovered that lightpaths of longer length suffer higher blocking probability than those of shorter li...

We propose an on-line wavelength assignment algorithm for multi-fiber WDM networks, in which lightpaths are established and released dynamically. For a given number of fibers per link and number of wavelengths per fiber, the algorithm aims to minimize the blocking probability. It may also be used to reduce the number of wavelengths required for a given tolerable blocking probability. Simulation...

In this paper, we show that coding can be used in storage area networks (SANs) to improve various quality of service metrics under normal SAN operating conditions, without requiring additional storage space. For our analysis, we develop a model which captures modern characteristics such as constrained I/O access bandwidth limitations. Using this model, we consider two important cases: single-re...

to compare intubating conditions and hemodynamic changes between bonfils intubation fiberscope and macintosh laryngoscopy without administering neuromuscular blocking drugs (nmbds). methods: in this randomized controlled trial,80 male and female patients, scheduled for elective surgery, aged 15 to 60 years, asa class ii or i, non-obese, non smokers, without anticipated difficult intubation; wer...

This paper presents the trade-offs that exist between the blocking probability, the size of the switching elements, the offered load and the link capacities in an ATM-based Banyan multistage interconnection network for QoS-sensitive applications. We present a quasi-analytical study which indicates that, as the link capacity between switching elements is increased, the blocking probability reduc...

Analytical techniques for the analysis of the traflc channel capacity in the Global System for Mobile (GSM) Communiccttions are studied in this paper. The results are represented for High Speed Circuit-Switched Data (HSCSD) trafic channels eo-existing with the voice trafic channels in a GSM cell. In a GSM system the base station has a finite number of traflc channels, from which one voice termi...

We propose a new wavelength assignment scheme that improves the blocking probability of WDM networks that use limited-range wavelength converters. Limited-range wavelength converters are attractive for wavelength-routed networks, given current technology, since they offer good utilization of the wavelength resource and improved blocking probability. However, their conversion ranges are limited;...

This paper develops a new channel assignment strategy for a broadband multi-beam High Altitude Platform (HAP) architecture that exploits cell overlap. This scheme delivers equal data rate capacity to users and the blocking probability seen by the users is independent of the area. Exploiting cell overlap reduces the overall levels of blocking and improves the capacity of the system. As users in ...

In this paper, we consider a class of loss networks where multiple tra c classes are present, each has di erent bandwidth requirement, and each tra c stream is routed according to an adaptive routing scheme. The performance metric of interest is the end-to-end call blocking probability. Blocking probabilities in a loss network have been studied quite extensively but very few considered multiple...

Centralized and Distributed methods are two connection management schemes in wavelength convertible optical networks. In the earlier work, the centralized scheme is said to have lower network blocking probability than the distributed one. Hence, much of the previous work in connection management has focused on the comparison of different algorithms in only distributed scheme or in only centrali...