A High-speed Compression Scheme for Vast Quantities of GPS Data
Sun Dihua · Journal of Sichuan University · 2011
To improve the transmission efficiency and save the storage space of GPS data in the traffic control and management,a differential preprocessing method was presented according to the characteristics of GPS data,and the compressibility was further enhanced by converting the time type.Besides,the dynamic Huffman algorithm was adopted to compress the GPS data.The theoretical analysis and reality testing showed that the compression ratio was more than 60%,and this scheme did not change the existed urban traffic facilities.The GPS positioning data which was transmitted to monitoring center by GPRS would be mostly reduced,and the communicating cost would be also decreased.At the same time,the channel used by GPRS would be shorten,the performance of real-time positioning would be improved.