Mobile positioning based on GSM in intelligent transportation systems

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This paper illustrated the performance of a mobile positioning technique applicable to GSM network. The framework of a positioning system based on GSM was proposed, and the hybrid TA/TOA methods were used. The performance of the proposed system was shown through simulations in various environments. The accuracy for 57% mobile stations (MS) is 70 m. Compared with the solution of embedded GPS chip and active GSM positioning, the experimental positioning system is superior in the respect of cost, accuracy, coverage and practicability. It can be put into the practical use.

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The problem to locate wireless base stations relates to how to make the best use of effectiveness, which is very important in the field of wireless communication engineering. This paper refers to the theories of graph partitioning, considering the number of covered vertex, the number of covered ranges and the gradient of density. We present a practical algorithm framework to solve the problem based on map partitioning. When considering the necessary conditions and optional conditions, our algorithm framework adopts the strategy of self adaptive divide and conquers. It works as three steps: divide and conquer map, check restraint conditions, and select locations. We conduct some experiments on Shanghai's traffic map and show the good allocations results for wireless base station in Shanghai city.
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