Study on Resource Allocation for Device-to-Device Communications in Cellular Networks
Date Issued
2014
Date
2014
Author(s)
Lin, Yi-Shao
Abstract
Device-to-device (D2D) communications underlaying cellular networks have been considered as an important technology to improve spectral efficiency. In D2D communications, rather than using uplink and downlink spectrums via the base station, the user equipment (UE) communicated directly between each other by reusing the cellular spectrum. However, D2D links may cause interferences to traditional cellular system and make quality-of-service (QoS) requirements not be satisfied for both D2D links and cellular users (CUs) if the interference has not be controlled properly. In this thesis, in order to do the resource allocation for D2D communications, we proposed a scheme to allow multiple number of D2D links sharing the spectrum with cellular users while guaranteeing the signal-to-interference-plus-noise ratios (SINRs) for both D2D users and CUs. The scheme checks whether all the SINR requirements of CUs and D2D users can be satisfied when a new D2D pair is admitted. Besides, when there are spare spectra, D2D pairs can share these spare spectra while all admitted D2D pairs SINR requirements must be satisfied. We checked the admitted D2D pairs based on ordered interference amounts which made our method systematic and with lower computational complexity. Based on our resource allocation method, the system can be adapted in different environments. The simulation results show that IF can significantly increase the number of admissible D2D pairs as well as improve the system throughput in underlaying cellular networks.
Subjects
設備對設備通信
服務品質
資源分配
信號與干擾加雜訊比
上行鏈路
重疊式蜂巢網路
Type
thesis
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