It is increasingly difficult to satisfy growing demands for spectrum with the conventional policy of fixed spectrum allocation. To overcome this problem, flexible/dynamic spectrum sharing methods that can significantly improve spectrum utilization of the spectrum have gained increasing interest recently. This paper presents two dynamic spectrum sharing approaches, a centralized and a decentrali...

Abstract – In online multimedia systems resources (e.g. network capacity) are to be evenly distributed among clients. These clients, however, usually have different QoS needs, and thus their actual capacity demands may vary considerably. In such context even distribution is not possible, but fair distribution, based on subjective client satisfaction must be achived instead. In this paper a new ...

An emerging model for computational grids interconnects similar multi-resource servers from distributed sites. A job submitted to the grid can be executed by any of the servers; however, resource size or balance may be different across servers. One approach to resource management for this grid is to layer a global load distribution system on top of the local job management systems at each site....