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In order to satisfy the request for precise clock synchronization in industry Ethernet, this paper has conducted the research to the IEEE1588 high-precision time synchronization algorithm, carried on the elaboration to the principle of algorithm, proposed the corresponding improvement algorithm for asymmetric communication paths and got it verified. The results of test show that the improved method...
Wireless sensor networks are appealing to researchers due to their wide range of application. This paper proposes Variable Grid-quorum Pattern MAC protocol (VGP-MAC), an adaptive, asynchronous and low-latency MAC protocol designed for wireless sensor networks. VGP-MAC improves the pattern and timeslot schedule, which make nodes save energy by the proper sleep mechanism according to the nodes' own...
In this paper, we take the design requirements of device identify mechanism for network lighting control system as the instruction, the content, basic framework and the sub-agreements option on device identify mechanism for network lighting control system are proposed. Based on these results, the cooperation relations among these sub protocols are explained.
Manchester II coding is now widely used in many aerospace and aeronautics bus protocols. In all these protocols, the maximum data transfer rate is less than 20Mbps. Due to lack of core physical interface (PHY), higher data transfer rate can not be achieved, and key system performance can not be raised as well. To break this bottleneck, a new type fiber-optic bus PHY was designed and implemented. In...
This paper summarizes the structure of WinPcap and introduces the capture principle of Ethernet packets. Based on multithreading technology, WinPcap captures the network layer packets. The design and realization method are provided by this paper. The overall optimization of system has improved the ability of the packet capture and greatly reduced the rate of packet loss. Data contents of the captured...
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