It is shown that, particularly for terrestrial cellular telephony, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques. A single-cell system, such as a hubbed satellite network, is addressed, and the basic expression for capacity is developed. The corresponding expressions for a multiple-cell system are derived. and the distribution on the number of users supportable per cell is determined. It is concluded that properly augmented and power-controlled multiple-cell CDMA promises a quantum increase in current cellular capacity. >

On the capacity of a cellular CDMA system

Praise for the Third Edition: "This is one of the best books available. Its excellent organizational structure allows quick reference to specific models and its clear presentation . . . solidifies the understanding of the concepts being presented."IIE Transactions on Operations EngineeringThoroughly revised and expanded to reflect the latest developments in the field, Fundamentals of Queueing Theory, Fourth Edition continues to present the basic statistical principles that are necessary to analyze the probabilistic nature of queues. Rather than presenting a narrow focus on the subject, this update illustrates the wide-reaching, fundamental concepts in queueing theory and its applications to diverse areas such as computer science, engineering, business, and operations research.This update takes a numerical approach to understanding and making probable estimations relating to queues, with a comprehensive outline of simple and more advanced queueing models. Newly featured topics of the Fourth Edition include:Retrial queuesApproximations for queueing networksNumerical inversion of transformsDetermining the appropriate number of servers to balance quality and cost of serviceEach chapter provides a self-contained presentation of key concepts and formulae, allowing readers to work with each section independently, while a summary table at the end of the book outlines the types of queues that have been discussed and their results. In addition, two new appendices have been added, discussing transforms and generating functions as well as the fundamentals of differential and difference equations. New examples are now included along with problems that incorporate QtsPlus software, which is freely available via the book's related Web site.With its accessible style and wealth of real-world examples, Fundamentals of Queueing Theory, Fourth Edition is an ideal book for courses on queueing theory at the upper-undergraduate and graduate levels. It is also a valuable resource for researchers and practitioners who analyze congestion in the fields of telecommunications, transportation, aviation, and management science.

Fundamentals of Queueing Theory

Information Theory and Reliable Communication

This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

Ultra Wideband Signals and Systems in Communication Engineering

Multicasting refers to a one-to-many network connection. Many-to-one and many-to-many connections are also categorized as multicasting. In a broadcast-and-select single-hop WDM network the only way to transmit information successfully is to have both source's transmitter and destination's receiver tuned to the same channel. The cost, scalability and efficiency issues of these approaches inspired researchers to study different ways in which the physical medium can be shared efficiently. In this paper, we study multicast traffic in single-hop local WDM optical networks based on a broadcast-and-select system. We use an approximate analytical solution to show the influence of tuning delay on the system performance under different network conditions. We also examine the effect of average packet delay on receiver throughput. Finally, we demonstrate the channel blocking probability versus network offered load characteristics.

Performance analysis study of multicast traffic in star-based local wdm lightwave networks

Many dynamic channel allocation (DCA) schemes for mobile networks have been studied. In this paper we take a look at the advantages and disadvantages of different DCA schemes in wireless ATM (asynchronous transfer mode) with new MAC (medium access control) protocol. To support wireless ATM, the future system would be microcellular or picocellular with a large number of base stations. The centralized DCA algorithm would not be suitable due to being neither robust nor scalable. This paper describes a cell-based distributed dynamic channel allocation algorithm with reduced message complexity and carrier acquisition delay.

/pdf/dynamic-channel-allocation-for-wireless-atm-19knzbfmgl.pdf

Dynamic channel allocation for wireless ATM

We study the performance of a new-framed pseudo-Bayesian Aloha algorithm with prioritized adaptive assignment algorithm. This algorithm provides to high priority control packets to the uplink frame of the reservation-TDMA wireless ATM MAC protocols with minimum effect on the access time of the low priority control packets. The protocol is analyzed with the wireless channel effect and results show that wireless channel improves access time performance for all priority classes.

A new MAC protocol for wireless ATM networks

This paper examines multicast traffic in single-hop local WDM lightwave networks based on a broadcast-and-select system. We use an approximate analytical solution and Markov model to show the effect of tuning time on system performance. We also show the trade-off between average packet delay against number of channels and network offered load. Finally, we show the trade-off between blocking probability and network offered load.

https://ieeexplore.ieee.org/iel5/8586/27215/01209258.pdf

Delay/throughput evaluation study on multicast traffic in WDM optical networks

In this paper we propose a generic architecture for a small powerful mobile computer that relies on network and its servers for majority of its activities. Since the network is located in middle of this architecture, we discuss the feasibility and capacity of using the network as a temporary dynamic storage in the form of cache for limited and frequently used data/control data. However the node delivery and file system design for the proposed network storage is not in the scope of this paper. We show how the routing loop can be utilized to convert the network delay and processing power of the routers to a virtual storage capacity in the network by keeping data in the network in form of floating IP packets. We call this approach Data Storage Technique on IP Networks (DSTN). In satellite and wireless communications this storage can be referred to as deviceless storage. We formulate the potential storage capacity and discuss the parameters that affect the capacity. We validate the technique by comparing the results obtained from the mathematical model with the results obtained from OpNet Modeler simulation tool. Since this paper is a preliminary part of this research, we address the future direction of the research in the last section.

/pdf/using-ip-networks-as-a-deviceless-storage-for-future-3rdxb3lp7p.pdf

Borhanuddin Mohd Ali

Papers

Performance analysis study of multicast traffic in star-based local wdm lightwave networks

Dynamic channel allocation for wireless ATM

A new MAC protocol for wireless ATM networks

Delay/throughput evaluation study on multicast traffic in WDM optical networks

Using IP networks as a deviceless storage for future portable computers