缓存与MIMO回程联合的内容传递方法

doi:10.19678/j.issn.1000-3428.0054767

计算机工程 ›› 2020, Vol. 46 ›› Issue (6): 164-171. doi: 10.19678/j.issn.1000-3428.0054767

缓存与MIMO回程联合的内容传递方法

徐文娟¹, 贾向东^1,2, 陈玉宛¹

1. 西北师范大学计算机科学与工程学院, 兰州 730070;
2. 南京邮电大学江苏省无线通信重点实验室, 南京 210003

收稿日期:2019-04-29 修回日期:2019-08-02 发布日期:2019-08-16
作者简介:徐文娟(1994-),女,硕士研究生,主研方向为无线通信关键理论与技术;贾向东,教授、博士;陈玉宛,硕士研究生。
基金资助:
国家自然科学基金（61861039，61561043，61261015）；甘肃省科技计划项目（18YF1GA060）。

Content Delivery Method Combined with Cache and MIMO Backhaul

XU Wenjuan¹, JIA Xiangdong^1,2, CHEN Yuwan¹

1. College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China;
2. Wireless Communication Key Lab of Jiangsu Province, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2019-04-29 Revised:2019-08-02 Published:2019-08-16

摘要/Abstract

摘要： 毫米波小蜂窝网络可提供较高的区域吞吐量，但其回程链路容量受限易造成阻塞。针对该问题，提出一种缓存小基站（SBS）与无线自回程SBS联合的内容传递方法。将部分流行内容预存储在缓存中，未存储内容由部署多输入多输出的宏基站传送。采用毫米波天线模式和视距球模型并借助随机几何工具，推导出缓存与回程联合内容传递异构网络的覆盖概率、平均区域速率和平均区域能量效率的表达式。实验结果表明，该方法可使波束变窄且传输更具有方向性，能够提高自回程传输的平均区域速率及接入链路的性能。

关键词: 异构网络, 多输入多输出, 缓存, 自回程传输, 毫米波

Abstract: Millimeter-wave small cell networks can provide high regional throughput,but its limited return link capacity often results in block.To address the problem,a content delivery method based on the combination of cache Small Base Station(SBS) and wireless self-backhaul SBS is proposed.Some popular content is pre-stored in the cache,and the content that is not stored is transmitted by the Macro Base Station(MBS) with deployed Multi-Input and Multi-Output(MIMO).Then the expressions of coverage probability,Average Area Rate(AAR) and average area Energy Efficiency(EE) of heterogeneous network of cache and backhaul joint content delivery are derived by using the millimeter wave antenna mode,the horizon sphere model and the stochastic geometry tool.Experimental results show that this method makes the beam narrower and the transmission more directional,and improves the performance of average area rate and access link of self-backhaul transmission.

Key words: Heterogeneous Network(HetNet), Multi-Input and Multi-Output(MIMO), cache, self-backhaul transmission, millimeter wave

中图分类号:

TN929.5

徐文娟, 贾向东, 陈玉宛. 缓存与MIMO回程联合的内容传递方法[J]. 计算机工程, 2020, 46(6): 164-171.

XU Wenjuan, JIA Xiangdong, CHEN Yuwan. Content Delivery Method Combined with Cache and MIMO Backhaul[J]. Computer Engineering, 2020, 46(6): 164-171.

http://www.ecice06.com/CN/Y2020/V46/I6/164

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