【作者】 孙建华；

【Author】 SUN Jian-hua (College of Art and Science, Beijing Union Universiyt, Beijing 100083)

【机构】 北京联合大学应用文理学院；

【摘要】 文章针对IEEE802．11b协议在户外传输中存在的问题进行研究,通过对CSMA/CA协议的访问流程进行修改,利用时间片选择的随机性,降低不同站点发送数据的冲突概率,有效解决了“隐藏结点”和“低数据吞吐量”等问题。从而提高了在户外现场监控设备图象传输的效率,系统已经成功应用于油田的无人值守监控系统。更多还原

【Abstract】 This paper aims at the transportation problem of IEEE802.11b protocol in outdoors, Pass negotiate to the CSMA/ CA of interview process carry on the modification, make use of random choice of time slots, the conflict that lowers the dissimilarity station to order to send out the data is all the rate, Resolved problems such as" conceal the knot to order" and" the low data swallows to vomit the quantity" etc. effectively. Thus raised to supervise and control the efficiency that the equipments portrait deliver on the scene outdoors. The system bases already succeed to apply to guard to supervise and control the system in the unmanned value of the oil-field.更多还原