Log-time algorithms for scheduling single and multiple channel data broadcast
MobiCom '97 Proceedings of the 3rd annual ACM/IEEE international conference on Mobile computing and networking
Scheduling data broadcast in asymmetric communication environments
Wireless Networks
Broadcast protocols to support efficient retrieval from databases by mobile users
ACM Transactions on Database Systems (TODS)
A Hybrid Index Technique for Power Efficient Data Broadcast
Distributed and Parallel Databases
Adaptive realtime bandwidth allocation for wireless data delivery
Wireless Networks
Efficient index caching for data dissemination in mobile computing environments
Journal of Systems and Software
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With the increasing popularity of portable wireless computers, mechanisms to efficiently transmit information to such {\em clients}\, are of significant interest. The environment under consideration is {\em asymmetric}\, in that the information server has much more bandwidth available, as compared to the clients. In such environments, often it is not possible (or not desirable) for the clients to send explicit requests to the server. It has been proposed that in such systems the server should broadcast the data periodically. One challenge in implementing this solution is to determine the {\em schedule}\, for broadcasting the data, such that the wait encountered by the clients is minimized. A {\em broadcast schedule}\, determines what is broadcast by the server and when. In this report, we present algorithms for determining broadcast schedules that minimize the wait time. Simulation results are presented to demonstrate that our algorithms perform well. Variations of our algorithms for environments subject to errors, and systems where different clients may listen to different number of broadcast channels are also considered.