bbin游戏

2017bbin游戏科研進展—物聯網
2018-05-23 17:24   審覈人:

高密度部署的移動節點通信研究進展

 

周發升、範立生、羅高涌等

 

物聯網研究團隊論文題目爲“A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission”的研究成果在高水平期刊IEEE AccessJCR一區,影響因子:3.87)發表。在此同時,團隊另外兩項科研成果也分別被信息與通信領域權威期刊IET CommunicationsJCR三區,影響因子:1.023)和IEEE Communications LettersJCR二區,影響因子:2.081)錄用發表。

在這些研究工作中,物聯網研究團隊與清華大學等機構合作,針對未來高密度部署的移動節點不可靠通信問題,基於調度的邊緣緩存技術對中斷率進行改進;針對高密度節點信號強幹擾問題,提出基於遞歸的波束成形,使信號波束準確發送到目標節點,有效降低一半乾擾,從而可以有效提升未來移動網絡的頻譜效率和能源效率。

          

高密度移動物聯網節點波束成形示意圖                                

 

 

A Cache-Aided Communication Scheme for Downlink Coordinated Multipoint Transmission

 

Abstract: Content caching at the base stations (BSs) is a promising strategy that can provide improved quality-of-service (QoS) provisioning for content-centric services, and at the same time reduce instantaneous backhaul payload. In December 2017, Dr. Fasheng Zhou and his colleagues focus on applications of the caching mechanism in the downlink of coordinated multipoint (CoMP) transmission, where the collaborating BSs cooperatively serve the user equipments (UEs). The paper was accepted for publication by the journal IEEE Access. In this paper, a cacheaided transmission scheme for downlink CoMP with limited local cache resources at the BSs is proposed to improve QoS provisioning in terms of outage performance. In order to cache files more efficiently while guaranteeing the QoS, the contents are divided into two sets, a popular set and a less popular set, according to their popularity profile following the Zipf model. The popular files are cached at all the BSs, while the less popular files are cached only at part of the BSs in a cache cluster subject to the strategy design. Furthermore, based on popularity of the requested files, UEs are categorized into two groups and the notion of request competition between the two groups is introduced. The corresponding request competition model and admission probabilities for transmission requests are analyzed. Based on the request competition model, the best cache placement strategy for the popular and less popular sets that minimizes the average outage probability is derived. Numerical results show that the proposed cache-aided CoMP scheme outperforms the baseline traditional caching strategies in terms of the average transmission outage.

 

This work was coauthored by Dr Fasheng Zhou (1st), Dr. Lisheng Fan (2nd) and Dr. Gaoyong Luo (4th) from Guangzhou University, Dr. Ning Wang from Zhengzhou University, Dr. Jie Tang from South China University of Technology and Dr. Wei Chen from Tsinghua University.  

 

 

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