Scheduling the Access to Multi-level Secure Databases in a Wireless Network Environment

To enhance scheduling efficiency and data security, we propose a Priority/MLS/AL framework for supporting transaction scheduling in wireless environments. In this framework, we divide users into three priority levels and data objects into four security levels. Mobile stations used in the experiments are cellular phones, personal digital assistants, laptops and personal computers. Altruistic locking is used as a mechanism for reserving data objects. We adopt an algorithmic approach to implement the system. The system behavior is simulated, showing that the framework proposed will enhance scheduling performance and data security. Better access control is achieved and deadlocks are avoided.