基于帶緩存的云接入網(wǎng)絡(luò)最優(yōu)能效設(shè)計(jì)

孫遠(yuǎn); 李春國(guó); 黃永明; 楊綠溪

doi:10.11999/JEIT180722

基于帶緩存的云接入網(wǎng)絡(luò)最優(yōu)能效設(shè)計(jì)

doi: 10.11999/JEIT180722 cstr: 32379.14.JEIT180722

東南大學(xué)信息科學(xué)與工程學(xué)院 ??南京 ??210096

基金項(xiàng)目: 國(guó)家863計(jì)劃(2015AA01A703)，國(guó)家自然科學(xué)基金(61372101, 61671144)

詳細(xì)信息

作者簡(jiǎn)介:
孫遠(yuǎn)：男，1988年生，博士生，研究方向?yàn)樵平尤刖W(wǎng)絡(luò)資源分配

李春國(guó)：男，1983年生，教授，博士生導(dǎo)師，研究方向?yàn)樾乱淮鸁o(wú)線(xiàn)通信理論與技術(shù)，基于人工智能的視頻信息處理，水下無(wú)線(xiàn)通信

黃永明：男，1977年生，教授，博士生導(dǎo)師，研究方向?yàn)橄乱淮苿?dòng)通信技術(shù)，毫米波MIMO

楊綠溪：男，1964年生，教授，博士生導(dǎo)師，研究方向?yàn)橄乱淮苿?dòng)通信技術(shù)，信號(hào)與信息處理

通訊作者:
楊綠溪　lxyang@seu.edu.cn

中圖分類(lèi)號(hào): TN92
計(jì)量
- 文章訪(fǎng)問(wèn)數(shù): 2204
- HTML全文瀏覽量: 908
- PDF下載量: 96
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2018-07-18
- 修回日期: 2019-01-28
- 網(wǎng)絡(luò)出版日期: 2019-02-15
- 刊出日期: 2019-07-01

Optimal Energy-efficient Design for Cache-based Cloud Radio Access Network

School of Information Science and Engineering, Southeast University, Nanjing 210096, China

Funds: The National 863 Project of China (2015AA01A703), The National Natural Science Foundation of China (61372101, 61671144)

摘要

摘要: 在云接入網(wǎng)絡(luò)(Cloud-RAN)中，現(xiàn)有工作大多假定射頻拉遠(yuǎn)頭(RRH)不具備緩存功能。然而下一代通信網(wǎng)絡(luò)具有以?xún)?nèi)容為中心的特性，因此在Cloud-RAN中考慮帶緩存的RRHs也變得有必要。該文考慮在Cloud-RAN中有效設(shè)計(jì)緩存方案，并通過(guò)資源分配有效減輕前程鏈路負(fù)擔(dān)。假設(shè)系統(tǒng)采用正交頻分多址接入(OFDMA)技術(shù)，通過(guò)聯(lián)合優(yōu)化子載波(SC)分配，RRH選擇與傳輸功率，最小化系統(tǒng)下行總功耗，并通過(guò)拉格朗日對(duì)偶分解轉(zhuǎn)化非凸問(wèn)題，獲得最優(yōu)分配方案。仿真結(jié)果表明，比起其它緩存方案，該文提出的優(yōu)化算法可以有效地提升系統(tǒng)能效，滿(mǎn)足未來(lái)通信需求。
- 云接入網(wǎng)絡(luò) /
- 緩存 /
- 能量效率 /
- 算法設(shè)計(jì)
Abstract: In Cloud Radio Access Network (Cloud-RAN), most of the existing work assumes Remote Radio Heads (RRHs) could not cache content. To better adapt the content-centric feature of next-generation communication networks, it is necessary to consider caching function for RRHs in Cloud-RAN. Motivated by this, this paper intends to design the suitable caching schemes and reduce the burden of fronthaul link burden through resource allocation. It is assumed the system utilizes Orthogonal Frequency Division Multiple Access (OFDMA) technique. A jointly optimization scheme of SubCarrier (SC) allocation, RRH selection, and transmission power is proposed to minimize the total downlink power consumption. To transform the original non-convex problem, a Lagrange dual decomposition is utilized to design the optimal allocation scheme. The experimental results show that the proposed algorithms can effectively improve the energy efficiency of the system, which meets the requirements of green communication in the future.
- Cloud Radio Access Network (Cloud-RAN) /
- Cache /
- Energy Efficiency (EE) /
- Algorithm design

HTML全文

圖 1 帶緩存Cloud-RAN下行傳輸結(jié)構(gòu)圖

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圖 2 RRH個(gè)數(shù)變化，本文算法最大復(fù)雜度變化趨勢(shì)

下載: 全尺寸圖片幻燈片

圖 3 用戶(hù)個(gè)數(shù)變化，本文算法最大復(fù)雜度變化趨勢(shì)

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圖 4 前程容量門(mén)限變化，多種方案功耗對(duì)比

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圖 5 單個(gè)RRH最大緩存數(shù)目變化，多種方案功耗對(duì)比

下載: 全尺寸圖片幻燈片

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