| 摘要(英) |
Distributed wireless networks have provided many conveniences for human life in many ways. In traditional, distributed wireless devices are controlled by people, but this is not civilized and scientific. Time synchronization is significant in distributed wireless networks to maintain coordination among distributed network nodes. Global clock synchronization is important to distributed wireless networks that require accurate timing information for data collection and energy conservation in media access control layer protocols. A synchronization error is inevitable in distributed wireless networks, due to be short of effective synchronization algorithms. Basically, clock synchronization can be divided into two types. Legacy solutions are the reference node based clock synchronization solution and the distributed clock synchronization solution. In the reference node based clock synchronization, non-reference nodes tune to the clock information distributed by reference nodes. On the other hand, the distributed clock synchronization, all nodes in the network perform the same distributed algorithm without reference nodes.
In this thesis, we design to solve the time synchronization problems for the embedded distributed wireless devices. To address these challenges, we propose a distributed clock synchronization protocol for this environment. For the purposes of power saving and synchronizing time, the system separates time sequence by using a smart time pattern setting. |
| 參考文獻 |
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[3] Bong Jun Choi and Xuemin Shen, “Distributed Clock Synchronization in Delay Tolerant Networks,” in Proceeding of IEEE International Conference on Communications, pp. 1-6, 2010.
[4] Xi Chen and Cheng Li, “A Routing Based Time Synchronization Protocol for Multi-Hop Wireless Networks,” in Proceeding of IEEE International Conference on Communications, pp. 1-6, 2010.
[5] Bong Jun Choi, Hao Liang, Xuemin Shen, and Weihua Zhuang, “DCS: Distributed Asynchronous Clock Synchronization in Delay Tolerant Networks,” IEEE Transactions on Parallel and Distributed Systems, pp. 491-504, 2012.
[6] Bong Jun Choi and Xuemin Shen, “Adaptive Asynchronous Sleep Scheduling Protocols for Delay Tolerant Networks,” IEEE Transactions on Mobile Computing, pp. 1283-1296, 2011.
[7] Bong Jun Choi and Xuemin Shen, “DSA: Distributed Semi-Asynchronous Sleep Scheduling Protocol for Mobile Wireless Networks,” in Proceeding of IEEE International Conference on Communications, pp. 1-5, 2011.
[8] Sungwon Lee, “An Enhanced IEEE 1588 Time Synchronization Algorithm for Asymmetric Communication Link using Block Burst Transmission,” IEEE Communications Letters, pp. 687-689, 2008.
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[10] Ollos, G. and Vida, R., “Sleep Scheduling Protocol for Mobile WSNs,” in Proceeding of IEEE 73rd Vehicular Technology Conference, pp. 1-5, 2011. |
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