电信科学 ›› 2015, Vol. 31 ›› Issue (5): 71-81.doi: 10.11959/j.issn.1000-0801.2015129

• 研究与开发 • 上一篇    下一篇

虚拟实时服务:构架、算法及演进路径

陈巍   

  1. 清华大学电子工程系 北京 100084
  • 出版日期:2015-05-15 发布日期:2015-08-20
  • 基金资助:
    “密集立体覆盖移动通信的基础理论与方法”国家重点基础研究发展计划“973”计划青年科学家专题基金资助项目;国家自然科学基金优秀青年科学基金资助项目

Virtural Realtime Services:Infrastructure,Algorithms and Evolution Path

Wei Chen   

  1. Department of Electronic Engineering,Tsinghua University,Beijing 100084,China
  • Online:2015-05-15 Published:2015-08-20
  • Supported by:
    National Basic Research Program of China(973 Program);National Natural Science Foundation of China,Excellent Young Investigator Award

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。

关键词: 虚拟实时服务, 多元协同通信, 透明多播推送, 认知频谱共享, 能量收割, 频谱效率, 能量效率

Abstract:

A virtual rea1-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 rea1-time service were proposed and analyzed,an evolution path toward virtual rea1-time service along with its major problems was also presented. Chen’s program was proposed to guide the development of the virtual rea1-time service related emerging industry and technologies.

Key words: virtual rea1-time service, multi-unit collaborative communication, transparent multicast push, cognitive spectrum reuse, energy harvesting, spectral efficiency, energy efficiency

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