中文摘要：

研究了移动无线网络数据的协作下载。为了鼓励资源有限的移动用户参与协作下载，针对多任务数据下载场景，利用协作用户既可作数据出售者也可作数据请求用户的合作者的双重身份，同时考虑协作用户差异化的服务质量，基于拍卖理论设计了一种新颖的数据协作下载激励机制，该机制能够激励并选择合适的协作用户完成数据下载任务。仿真实验表明，这种激励机制的性能优于忽略协作用户双重身份的激励机制，有效提高了协作用户的服务质量、请求用户获得的效用和社会福利。

英文摘要：

The problem of cooperative downloading of mobile wireless limited resources in mobile devices to participate in cooperative data downl was studied. To spur the mobile users with oading, a novel incentive mechanism for co- operative data downloading based on auction theories was designed with the considerations of cooperative users＇ dif- ferential service qualities and their dual identity （they can be treated as data sellers as well as partners of request- ors）. The incentive mechanism can spur and select appropriate users to complete data downloading tasks under multi-task situation. The simulation experiment shows that compared with the incentive mechanisms ignoring dual identity of cooperative users, this new incentive mechanism can improve the quality of cooperative service, utility of requestors and social welfare.