Dynamic Bandwidth Allocation (DBA) in passive optical networks presents a key issue for providing efficient and fair utilization of the PON upstream bandwidth while supporting the QoS (Quality-of-Service) requirements of different traffic classes. In this paper, the authors compare the typical characteristics of DBA, such as bandwidth utilization, delay and jitter at different traffic loads, ...

Over the last two decades Free-Space Optical communication (FSO) has become more and more interesting as an adjunct or alternative to radio frequency communication. In this paper, performance of Free Space Optical (FSO) communication in the presence of atmospheric turbulence is presented. FSO system required free line of sight between the transmitter and receiver. Light ...

The new generation vehicle will provide connectivity and telematics services for enabling vehicle communication. The communication over IP in TCP/IP (Transmission Control Protocol /Internet Protocol), means enables a connection between external node and in-vehicle nodes using IP protocols. In order to bring IP into the vehicle communication Ethernet technology is needed. Ethernet technology will provide ...

Ad-hoc network is a self-configuring network, in other words the authors can say ad-hoc network is a collection of number of mobile nodes. These nodes are communicated to each other through the wireless links. In ad-hoc network nodes moves from one place to another, so the topology is dynamic. The authors know that researchers have ...

This GSM (Global System for Mobile communication) radio network planning is to provide a cost-effective solution for the radio network in terms of coverage, capacity and quality. Band width is a scarce natural resource. This paper involves hands-on simulation exercise on planning of RF network with the help of Atoll planning software tool. The main ...

The human voice communication through GSM has become most important part of life. The voice speech requires encoding and decoding of the signal. It determines the quality of recovered speech and the capacity of the system. In Global System for Mobile communication (GSM) wireless system, bandwidth is precious goods and telecom service providers are continuously ...