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Energy efficient D2D communications in dynamic TDD systems
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik.ORCID-id: 0000-0001-6752-6822
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik.
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik.
2017 (Engelska)Ingår i: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 65, nr 3, s. 1260-1273Artikel i tidskrift (Refereegranskat) Published
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.

Ort, förlag, år, upplaga, sidor
IEEE, 2017. Vol. 65, nr 3, s. 1260-1273
Nyckelord [en]
D2D communication, energy-efficient network, dynamic TDD, mode selection, power control
Nationell ämneskategori
Telekommunikation
Identifikatorer
URN: urn:nbn:se:kth:diva-193001DOI: 10.1109/TCOMM.2016.2616138ISI: 000398596500003Scopus ID: 2-s2.0-85017605288OAI: oai:DiVA.org:kth-193001DiVA, id: diva2:974117
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QC 20161019

Tillgänglig från: 2016-09-24 Skapad: 2016-09-24 Senast uppdaterad: 2017-11-06Bibliografiskt granskad

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TC_2016(2907 kB)101 nedladdningar
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