Data management for mobile computing
ACM SIGMOD Record
Energy efficient indexing on air
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
Mobile wireless computing: challenges in data management
Communications of the ACM
Balancing push and pull for data broadcast
SIGMOD '97 Proceedings of the 1997 ACM SIGMOD international conference on Management of data
“Data in your face”: push technology in perspective
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
Push-Based Information Delivery in Two Stage Satellite-Terrestrial Wireless Systems
IEEE Transactions on Computers
An Adaptive Access Method for Broadcast Data under an Error-Prone Mobile Environment
IEEE Transactions on Knowledge and Data Engineering
Prefetching from Broadcast Disks
ICDE '96 Proceedings of the Twelfth International Conference on Data Engineering
Disseminating Updates on Broadcast Disks
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Indexed Sequential Data Broadcasting in Wireless Mobile Computing
ICDCS '97 Proceedings of the 17th International Conference on Distributed Computing Systems (ICDCS '97)
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In a ubiquitous information environment, a large number of users carrying their low-powered portable computers can retrieve information anywhere and anytime by a wireless mobile computing technology. Wireless data broadcasting, as a way of disseminating information to the large number of clients, has an inherent advantage. It provides all types of users global access to information. Lo and Chen [IEEE Trans. Knowl. Data Eng. 12 (4) (2000) 609] have proposed a method known as adaptive access method. This method works in an error-prone mobile environment and tolerates the access failure in which the occurrence of access failures is due to disconnections, handoffs, and communication noises. However, the influence of version bits to deal with the updates of the broadcast data has not been exploited for the broadcast with modified (but the same size and structure) update. In this paper, we identify the types of updates and investigate the access methods. The basic idea is to distinguish the type of update that does not influence the change in the size and structure of the broadcast. To deal with the types of updates, we classified the users in mobile computing environment into the users in-system and the new users. In the proposed continuous algorithms, the users in-system record the previous result and use it efficiently to access the desired records with less number of additional probes in the broadcast, which is updated by a stream of same size and structure bits. In the performance analysis, the experimental results show that our proposed modified progression method has the best performance, as it requires the minimum cost to access the broadcast data.