Power control and scheduling for wireless data communications

Master'sMASTER OF ENGINEERIN

Channel Allocation Methods for Data Dissemination in Mobile Computing Environments

This paper discusses several channel allocation methods for data dissemination in mobile computing systems. We suggest that the broadcast and on-demand channels have different access performance under different system parameters and that a mobile cell should use a combination of both to obtain optimal access time for a given workload and system parameters. We study the data access efficiency of three channel configurations: i) all channels are used as ondemand channels (exclusive on-demand), ii) all channels are used for broadcast (exclusive broadcast) and iii) some channels are on-demand channels and some are broadcast channels (hybrid). Simulations on obtaining the optimal channel allocation for lightly-loaded, medium-loaded, and heavy-loaded conditions were conducted and the result shows that an optimal channel allocation significantly improves the system performance. 1. Introduction A mobile computing system consists of a set of mobile computers and stationary hosts connected by a..

Optimal Channel Allocation for Data Dissemination in Mobile Computing Environments

This paper discusses wireless channel allocation problem for data dissemination in mobile computing systems. Methods for accessing data through broadcast and on-demand channels are described. We provide analytical models and cost formulae for the exclusive broadcast channels and the exclusive on-demand channels and propose a dynamic channel allocation algorithm for optimizing system performance. Our performance evaluation shows that dynamic channel allocation significantly improves system performance and the channel allocation algorithm gives us the optimal solution for various system parameter settings. 1 Introduction One of the critical issues for mobile computing systems is how to efficiently utilize the wireless communication bandwidth. This paper presents wireless channel allocation methods for data dissemination in mobile computing environments. Wireless broadcast allows an arbitrary number of users to simultaneously receive information broadcast on the air without any performa..