Adaptive data access in broadcast-based wireless environments

Power conservation and client waiting time reduction are two important aspects of data access efficiency in broadcastbased wireless communication systems. The intention of data access methods is to optimize client power consumption with the least possible overhead on client waiting time. In this paper, we propose an adaptive data access method which builds on the strengths of indexing and hashing techniques. We show that this method exhibits better average performance over the well-known index treebased access methods. A new performance model is also proposed. This model uses more realistic assessment criteria, based on the combination of access and tuning times, for evaluating wireless access methods. This new model provides a dynamic framework to express the degree of importance of access and tuning times in an application. Under this new model, the adaptive method performance also outperforms the other access methods in the majority of cases.