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Interference-Based Decode and Forward Scheme Using Relay Nodes in Heterogeneous Networks
Interference-Based Decode and Forward Scheme Using Relay Nodes in Heterogeneous Networks
Nishimori, Kentaro
6394
Kitao, Koshiro
6395
Imai, Tetsuro
6396
This paper proposes interference-based decode and forward scheme that utilizes relay stations (RSs). In Long-Term-Evolution (LTE-) Advanced, heterogeneous networks in which femto- and picocells are overlaid onto macrocells are extensively discussed. However, interference between macro- and pico(femto)cells arises due to their different transmit power levels. Unlike conventional cooperative transmission schemes, the RS decodes interference in the first transmit timing period and forwards it to the user equipment (UE) in the second period. Moreover, cooperative transmission can be achieved without stopping the transmission from the base station (BS) to UE when forwarding the interference from the RS to the UE by utilizing the fact that signal-to-noise power ratio (SNR) between the RS and UE is much greater than that between the BS and UE. The basic performance of the proposed method is shown based on computer simulation. Moreover, the interference temperature and shadowing effect are measured when considering the coexistence between macro- and femtocells, and the performance of the proposed method is verified using measured shadowing effect.
journal article
Hindawi Publishing Corporation
2012-12
application/pdf
International Journal of Antennas and Propagation
103501
2012
1
10
International Journal of Antennas and Propagation
16875869
https://niigata-u.repo.nii.ac.jp/record/1964/files/2012_103501_1-10.pdf
eng
info:doi/10.1155/2012/103501
(C)2012 Kentaro Nishimori et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.