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Recouping Opportunistic Gain in Dense Base Station Layouts Through Energy-Aware User Cooperation

Wang, Qing and Rengarajan, Balaji (2013) Recouping Opportunistic Gain in Dense Base Station Layouts Through Energy-Aware User Cooperation. In: The 14th IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (IEEE WoWMoM 2013), 4 - 7 June 2013, Madrid, Spain.

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Abstract

To meet the increasing demand for wireless capacity, future networks are likely to consist of dense layouts of small cells. Thus, the number of concurrent users served by each base station (BS) is likely to be small which results in diminished gains from opportunistic scheduling, particularly under dynamic traffic loads. We propose user-initiated BS-transparent traffic spreading that leverages user-to-user communication to increase BS scheduling flexibility. The proposed scheme is able to increase opportunistic gains and improve user performance. For a specified tradeoff between performance and power expenditure, we characterize the optimal policy by modeling the system as a Markov decision process and also present a heuristic algorithm that yields significant performance gains. Our simulations show that, in the performance-centric case, average file transfer delays are lowered by up to 20% even in homogeneous scenarios, and up to 50% with heterogeneous users. Further, we show that the bulk of the performance improvement can be achieved with a small increase in power expenditure, e.g., in an energy-sensitive case, up to 78% of the performance improvement can be typically achieved at only 20% of the power expenditure of the performance-centric case.

Item Type: Conference or Workshop Papers (Paper)
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Qing Wang
Date Deposited: 06 May 2013 07:14
Last Modified: 15 Dec 2016 12:43
URI: http://eprints.networks.imdea.org/id/eprint/501

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