The Research of Distributed Mobile Computing Based on Shared Memory Architecture
| Autor: | Yu-Ming Hsieh, 謝玉明 |
|---|---|
| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 D2MCE (Dynamic Distributed Mobile Computing Environment), a system based on DSM (Distributed Shared Memory) and implemented on mobile devices, is proposed in my thesis. This system adopts Mobile Ad-hoc Network (MANet) as its network architecture. Due to the feature of mobile nodes, a distributed mobile computing group constructed by the nodes can possibly change any time, that is, nodes can join or leave the transmission scope of the computing group. For the reason, this system provides a mechanism allowing users dynamically join or leave a computing group during the computing period, and transferring the authority of management such as Home, Group Coordinator, Synchronization Coordinator and Manager while nodes are leaving. Besides, there are three optimized methods offered in D2MCE to reduce the number and the amount of messages, including Writing-labeling, Diff Version Control and Moving Home. First, the mechanism of writing-labeling can decrease times that shared data are written back to Home. Second, by judging the difference of versions, nodes can merely update the modified content among different versions to reduce the amount of messages. Third, the method of Moving Home can decrease times of dealing remote shared data by moving Home to the node with the most frequency of access. From the testing result, it is found that adopting optimized methods can effectively improve performance. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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