中文摘要：

提出了一种基于虚拟实时服务的协议构架,可有效发掘用户提出通信请求之前的＂负时间轴＂上的空闲时频资源或可再生能源,将用户可能感兴趣的内容以多播的方式预先推送到终端的存储器中,从而以非实时的通信提供虚拟实时服务,在确保服务质量的前提下大幅度提升频谱和能量效率。对终端缓存内容的选择算法进行了标准化,从而允许基站在本地预测用户已缓存的内容,并判断当前是否应发起推送和推送哪条内容;提出了虚拟实时服务涉及的若干关键算法,也给出了虚拟实时服务的演进途径及主要开放问题,旨在为相关新兴产业的技术发展提供参考。

英文摘要：

A virtual real-time service infrastructure for future wireless access, which is capable of efficiently using the idle timeslots or renewable energy distributed in the ＂negative time-axis＂ before users＇ transmission requests was proposed. By using these idle timeslots, the information content in which users might be interested can be pushed to the end devices＇ buffers in a multicasting manner before a user requests the content. The end devices ＇ algorithm which determines which content should be buffered was standardized. Hence, the base-station may locally predict what have been buffered in the users＇ devices, and determine whether it should push and which content to transmit.Meanwhile, a number of key algorithms for virtual real-time service were proposed and analyzed, an evolution path toward virtual real-time service along with its major problems was also presented. Chen ＇s program was proposed to guide the development of the virtual real-time service related emerging industry and technologies.