NDLI: Cooperative relay design for energy efficient cell capacity improvements

Content Provider	IEEE Xplore Digital Library
Author	Hong Li Koudouridis, G.P. Hedby, G. Tao Wu
Copyright Year	2012
Description	Author affiliation: Central Research & Development Unit, Huawei Technologies Co., Ltd, Shenzhen, P. R. China (Tao Wu) \|\| Wireless Research & Development Department, Huawei Technologies Sweden AB, Stockholm, Sweden (Hong Li; Koudouridis, G.P.; Hedby, G.)
Abstract	The effect of relaying in terms of energy efficiency is an important and interesting issue in cellular communications. In this paper, two relaying schemes for uplink are analyzed and compared in the context of cellular systems: Simple relaying (SR), where a user is served either by a relay node or the base station, and Cooperative Relaying (CR), where a user is served by the relay node, the base station or both in a cooperative manner. For the relaying a specific relay network topology is proposed where the relay nodes are deployed at the edge of each cell. The two schemes are analyzed in terms of cell capacity, provided through bit error analysis, and energy efficiency, and are compared to a baseline scheme that is based on a macro network topology with no relays. Based on the proposed relay network topology and the Decode-and-Forward relaying mechanism, this study focuses on finding out the optimal access path between a user and its serving base station. The optimization is performed according to a utility function which targets to maximizing cell capacity and energy efficiency. By choosing the optimal access path while decreasing the energy consumption per user, both cell capacity and energy efficiency of the wireless network are improved. By means of numerical simulations, it is shown that the relay schemes fully outperform the baseline wireless network without relays in both cell capacity and energy efficiency. In all simulation scenarios the CR scheme is the best performing scheme showing a gain around 33% in terms of cell capacity and a gain around 190% in terms of energy efficiency on average over the baseline. Further improvements are expected by utilizing more efficient cooperative relay schemes which will be exploited in the future work.
Starting Page	6018
Ending Page	6023
File Size	320220
Page Count	6
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6364918
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Computer architecture Energy efficiency Microprocessors Bit error rate Numerical models Energy consumption energy efficiency cooperative relay cell capacity
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
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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