Resource Allocation in OFDMA Wireless Communications Systems Supporting Multimedia Services

Abstract:
We design a resource allocation algorithm for downlink of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm aims at maximizing system throughput while satisfying quality of service (QOS) requirements of the RT and BE services. We take two kinds of QOS requ ....etc

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Mobile Agents In Distributed Multimedia Database Systems
Abstract: The size of networks is increasing rapidly and this fact is not straitened to the internet alone. Many intra and inter organization networks are affected by this trend, too. A side effect of this growth is the increase of network traffic. This development leads to new challenges and we have to think about new technologies. Mobile agent systems are one answer to these challenges. Mobile agents are an emerging technology attracting interest from the fields of distributed syste ....etc

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its based on CORBA and mobile agent technology,was implemented in pure Java using only standard CORBA facilities,which is able to run Java code as a stored procedure. Further measurements have justified the idea presented above, ie. sending agents directly inside the database can decrease the response time of multimedia content search and retrieval. However, the required modifications made the embedded agency accessible for clients using only Aurora, Oracle's modified Visibroker ORB. On the basis of the Proxy design pattern, the paper presents ....etc

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prepared by:
Amarnath Gupta




Introduction

Multimedia: a working definition
A combination of two or more categories of information having different transport signal characteristics
Typically, one medium is a continuous medium while another is discrete
Image, audio, video and graphics are examples of media ....etc

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MOBILE MULTIMEDIA COMMUNICATION

Mobile multimedia is defined as a set of protocols and standards for multimedia information exchange over wireless networks.
Mobile multimedia is one of the mainstream systems for the next generation mobile communications, featuring large voice capacity, multimedia applications and high-speed mobile data services.

Cellular Evolution
Mobile Multimedia Basics
Mobility is one of the key drivers of mobile multimedia
User mobility: The user is forced to move from one location to
location during f ....etc

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Resource Allocation in OFDMA Wireless Communications Systems Supporting Multimedia Services

abstract

We design a resource allocation algorithm for downlink of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm aims at maximizing system throughput while satisfying quality of service (QoS) requirements of the RT and BE services. We take two kinds of QoS requirements into acc ....etc

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