Energy efficient air indexing schemes for single and multi-level wireless channels

In wireless communication, broadcasting is one of the most suitable solutions of information dissemination. It is very attractive for limited resource handheld mobile devices in asymmetric communications. Access time and Tuning time are two criteria to evaluate the performance of air indexing technique. Indexing can reduce tuning time of the mobile devices by switching mobile device into doze mode while waiting for desired of data to arrive and active mode while desired of data has presented. Some air indexing techniques can save limited battery power while incurring only limited overhead on access time. In this paper, we discuss and analyze energy efficient air indexing techniques for single and multi-level wireless channel. The basic indexing techniques i.e. B+ tree, the hashing and the signature schemes of data broadcasting are compared between Single and Multi-level channel.