NDLI: Coordinated caching model for minimizing energy consumption in radio access network

Content Provider	IEEE Xplore Digital Library
Author	Yuemei Xu Yang Li Zihou Wang Tao Lin Guoqiang Zhang Song Ci
Copyright Year	2014
Description	Author affiliation: High Performance Network Lab., Inst. of Acoust., Beijing, China (Yuemei Xu; Yang Li; Tao Lin) \|\| Nat. Comput. Network Emergency Response Tech. Team/Coordination Center of China, China (Zihou Wang) \|\| Sch. of Comput. Sci. & Technol., Nanjing Normal Univ., Nanjing, China (Guoqiang Zhang) \|\| Dept. of Comput. & Electron. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE, USA (Song Ci)
Abstract	To reduce network access latency, network traffic volume, and server load, caching capacity was proposed as a component of eNodeBs in the radio access network (RAN). These eNodeB caches require less transport energy but bring additional caching energy through providing each eNodeB with caching capacity. It is thus challenging for eNodeBs to make content placement and request routing decisions so as to minimize the total energy consumption, especially when considering different caching hardware technologies, arrival rate of requests and content popularity. To address this problem, we first build an energy model to formulate the problem of minimizing energy consumption at eNodeB caches. Then a Lagrangian relaxation technique is adopted to find a near-optimal solution to the proposed model. Based on the proposed model and the obtained solution, we design a practical scheme for coordinating the content placement and request routing, and thus ensure the minimum-energy eNodeB caches. Compared with the existing works, our proposal significantly reduces the energy consumption by approximately 28% while keeps a good network performance. Our results also indicate that caching hardware technologies and content popularity greatly affect the content placement, therefore are crucial to the energy efficiency of eNodeB caches.
Starting Page	2406
Ending Page	2411
File Size	385445
Page Count	6
File Format	PDF
ISBN	9781479920037
DOI	10.1109/ICC.2014.6883683
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-10
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Energy consumption Servers Radio access networks Nickel Routing Random access memory Wireless communication
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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