Discrete event simulation: a practical approach
Discrete event simulation: a practical approach
Mobile wireless computing: challenges in data management
Communications of the ACM
Mobile Cellular Telecommunications Systems
Mobile Cellular Telecommunications Systems
The Challenges of Mobile Computing
Computer
Asynchronous parallel discrete event simulation
IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans
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The communication infrastructure of a mobile computing environment can be based on the structure of a cellu- lar/microcellular telephone system or a PCS network. In such a system,the occurrence of handoffs cannot be avoided and when handoffs occur, wireless links held by mobile computers crossing cell boundaries may be forced to terminate. The probability that a handoff access request will result in forced termination has a significant effect on the performance of a mobile computing envi- ronment, as does the probability that an initial access request will be blocked. Although some research has been done on initial and handoff accesses in cellular/microcellular telephone systems and PCS networks, the analytical models used in this research are not appropriate for mobile computing, since unlike a telephone, a mobile computer may use several channels at once. In this paper, we develop an analytical model to study initial and handoff accesses in a mobile computing environment. The model is based on a multi-dimensional continuous time Markov chain. The accuracy of the model is verified by comparison with simula- tion results. We then use the model to find a practical approach to balancing the initial access blocking probability and average forced termination probability of a connection in a mobile computing network.