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The process of urbanization is formed by regular movements of human beings. It yields different functional zones in a city, such as residential zone and commercial zone. Consequently, there exists a close connection between the human mobility pattern and the city's zones. However, it is not easy to collect large-scale society-wide data that can precisely capture the underlying relations between the...
Clustering algorithms based on Grid are attractive for the task of data partition in spatial database. In the background of big data more and more research focuses on how to solve the conflict between efficiency and accuracy of clustering. Existing Grid-based clustering algorithms generally have a high time efficiency without considering the distribution of the data inside a grid. In this paper, a...
The paper has studied the impact of interference traffic on transmission performance in IEEE 802.16 Mesh network. A new routing algorithm based on minimum interference traffic is proposed. Based on the routing tree a corresponding collision-free scheduling procedure is discussed. Because the impact of interference traffic can be controlled effectively, the system throughput has improved greatly. Simulation...
A novel approach of channel utilization measurement in WLAN was proposed. Source sends probe packets whose time stamp options are being set. The current time is recorded in the packets hop by hop. Through the improved channel utilization statistical processing, the process delay, propagation delay, transmission delay and router clock skew can be eliminated, the queuing delay of each probe packet is...
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