中文摘要：

采用基于Socket的TCP／UDP传输协议（TCP协议用于一般信息交互，UDP协议用于图像数据传输）实现车载终端和服务器之间同时传送信息和图像的功能，提高数据传输效率．生成图像时，保证接收的图像数据包按照预期顺序排列，提出的数据包重传算法可以有效解决丢包问题，并且系统可以同时支持多个终端连接。

英文摘要：

Adopted Socket - based TCP/UDP transmission protocols （TCP protocol was used for general information interaction, while UDP protocol for image data transmission） to implement the function of transmitting !nformation and image between vehicle positioning device and server at the same time, in this way, the data transmission efficiency could be enhanced. While creating the image, made sure that the received image data packages arranged according The data packages re - transmission, which was presented, can resolve the to the expectant order. packages loss problem effectively. Further more, this system can support multi -device to connect synchronously.