Introduction

-Exchange of data between two or more separate, independent processes/threads.
-Operating systems provide facilities/resources for inter-process communications (IPC), such as message queues, semaphores, and shared memory.
-Distributed computing systems make use of these facilities/resources to provide application programming interface (API) which allows IPC to be programmed at a higher level of abstraction. (e.g., send and receive)
-Distributed computing requires information to be exch ....etc

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Introduction
iDEN is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone. iDEN places more users in a given spectral space, compared to analog cellular and two-way radio systems, by using speech compression and time division multiple access TDMA. Notably, iDEN is designed, and licensed, to operate on individual frequencies that may not be contiguous. iDEN operates on 25kHz channels, but only occupies 20 kHz in order to provide ....etc

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internship report on construction of duplex house ....etc

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WiMAX for Broadband Wireless Access
Presented By:
Karim M. El Defrawy
ICS
UCI-2005
Outline
What is WiMAX
802.16 Introduction
802.16 MAC Highlights
802.16 Reference Model
MAC Convergence Sub-Layer (CS)
MAC Common Part Sub-Layer (CPS)
MAC Privacy Sub-Layer (PS)
Questions
What is WiMAX?
Worldwide Interoperability for Microwave Access (WiMAX) is the common name associated to the IEEE 802.16a/REVd/e

standards.

These standards are issued by the IEEE 802.16 subgroup that originally covered the Wireless Local Loop technol ....etc

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ABSTRACT
The basic problems of wireless access are that the available spectrum is too limited and there is great attenuation of energy.These can be solved by frequency reuse and by reducing the maximum distance from the terminal to the nearest base station.
Distributed wireless communication system (DWCS) is a new architecture for a wireless access system with distributed antennas, distributed processors, and distributed controlling. The basic idea is to flatten the tree cellular structure. With distributed antennas, syste ....etc

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ABSTRACT
Third generation is the generic term used for the next generation of mobile communications systems. 3G will provide enhanced services to those - such as voice, text and data - predominantly available today.
Video on demand, high speed multimedia and mobile Internet access are just a few of the possibilities for users in the future. 3G Services will expand the possibilities of information and communication.
UMTS is a part of the International Telecommunications Union's (ITU's) 'IMT ....etc

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The third generation of mobile cellular systems are intended to unify the diverse systems we see today into a seamless radio infrastructure capable of offering a wide range of services in different radio environments, with the quality we
have come to expect from wire line communication networks. Since the mid-80's, studies on 3G systems have been carried out within the International Telecommunication Union (ITU), where it was called Future Public Land Mobile Telecommunication Systems (FPLMTS), lately renamed International Mobile Telecommunicat ....etc

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ABSTRACT
Voice (and fax) service over cable networks is known as cable-based Internet Protocol (IP) telephony. Cable based IP telephony holds the promise of simplified and consolidated communication services provided by a single carrier at a lower cost than consumers currently to pay to separate Internet, television and telephony service providers. Cable operators have already worked through the technical challenges of providing Internet service and optimizing the existing bandwidth in their cable plants to deliver high ....etc

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INTRODUCTION

From its origin more than 25 years ago, Ethernet has evolved to meet the increasing demands of packet-switched networks. Due to its proven low implementation cost, its known reliability, and relative simplicity of installation and maintenance, its popularity has grown to the point that today nearly all traffic on the Internet originates or ends with an Ethernet connection. Further, as the demand for ever-faster network speeds has grown, Ethernet has been adapted to handle these higher speeds and the concomi ....etc

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Hi am kavitha i would like to get details on ppt for mobile train radio communication ....etc

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Data Transmission Modes
1.Simplex: 1. In simplex mode the communication can take place only in one direction. The receiver receives the signal from the transmitting device. This mode of flow of information is Unidirectional. Example: Radio, T.V., Pager transmission.
2.Half-duplex: In half-duplex mode the communication channel is used in both directions, but only in one direction at a time. Thus a half-duplex line can alternately send and receive data.Example is the wireless communication.
3.Full-duplex: In full du ....etc

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