Change search
ReferencesLink to record
Permanent link

Direct link
Energy efficient D2D communications in dynamic TDD systems
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Automatic Control.
(English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857Article in journal (Refereed) Submitted
Abstract [en]

Device-to-Device (D2D) communication is a promising technology for improving the performance of proximity-based services. This paper demonstrates how the integration of D2D communication in cellular systems operating under dynamic Time Division Duplex (TDD) can improve energy efficiency. We perform joint optimization of mode selection, uplink/downlink transmission period, and power allocation to minimize the transmission energy consumption while satisfying a traffic requirement. Solutions are developed for two scenarios: with and without interference among D2D communications. Both formulations are expressed as mixed-integer nonlinear programming problems, which are NP hardin general. We exploit problem structure to develop efficient solutions for both scenarios. For the interference-free case, we develop algorithms that find the optimal solution in polynomial time. When considering interference, we propose a customized solver based on branch-and-bound that reduces the search complexity by taking advantage of the problem-specific proprieties. We complement this solver by a more practical heuristic algorithm. Simulation results demonstrate that D2D communications in dynamic TDD systems can yield significant energy savings and improved spectral efficiency compared to traditional cellular communication. Furthermore, we give analytical characterizations of the receiver locations relative to a given transmitter where D2D communication is optimal. These regions can be surprisingly large and not necessarily circular.

National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-193001OAI: diva2:974117

QC 20161019

Available from: 2016-09-24 Created: 2016-09-24 Last updated: 2016-10-19Bibliographically approved

Open Access in DiVA

TC_2016(2907 kB)4 downloads
File information
File name FULLTEXT01.pdfFile size 2907 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Della Penda, DemiaFu, LiqunJohansson, Mikael
By organisation
Automatic Control
In the same journal
IEEE Transactions on Communications
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 4 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 12 hits
ReferencesLink to record
Permanent link

Direct link