Efficient Use of Paired Spectrum Bands through TDD Small Cell Deployments

Agustín, Adrián; Lagén, Sandra; Vidal, Josep; Muñoz, Olga; Pascual‐Iserte, Antonio; Guo, Zhouyi; Wen, Rong-hui

doi:10.1109/mcom.2017.1601173

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Traditional frequency division duplex (FDD) systems usually employ the paired frequency bands for uplink and downlink transmissions [5], which is difficult to meet the demand of asymmetry data services. Asymmetric FDD carrier aggregation can solve the problem, whereas leads to increased cost and power consumption [6,7].…”

Section: Introductionmentioning

confidence: 99%

Coverage and Spectral Efficiency of Network Assisted Full Duplex in a Millimeter Wave System

He¹,

Zhao

Fan³

et al. 2021

Electronics

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To cope with the growing trend of asymmetric data traffic, we introduce a novel network assisted full duplex (NAFD) for a millimeter wave system. NAFD can dynamically allocate the number of remote radio heads in the uplink mode or in the downlink mode, which can facilitate simultaneous uplink and downlink communications. In this manuscript, we use stochastic geometry to analyze the distribution of the signal-to-interference-plus-noise ratio and the data rate in a NAFD system. The numerical results verify the analysis and show that the NAFD outperforms the dynamic time division duplex system and the traditional flexible duplex system in terms of spectral efficiency.

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Section: Introductionmentioning

confidence: 99%

Coverage and Spectral Efficiency of Network Assisted Full Duplex in a Millimeter Wave System

He¹,

Zhao

Fan³

et al. 2021

Electronics

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“…However, FDD-based networks with a preassigned paired spectrum tend to have a large amount of unused resources in the FDD-UL band, because of the traffic asymmetry. Current 3GPP LTE-A standard and regulation hamper the use of those unused resources for DL [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Signal-Timing Offset Compensation in Dense TDD OFDM-Based Networks

Agustín

Lagén

Vidal

2017

GLOBECOM 2017 - 2017 IEEE Global Communications Conference

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Orthogonal Frequency Division Multiplexing (OFDM)based networks rely on time synchronization to obtain their best performance. Time synchronization with neighboring nodes can be satisfied by increasing the cyclic prefix (CP) length (at the expenses of spectral efficiency reduction) We show that by optimizing the transmit precompensation and receive post-compensation we can meet the time synchronization constraints and keep the CP at its minimum value. This concept is applied to paired-bands Frequency Division Duplexing (FDD) systems which tend to show inefficient occupancy of the uplink (UL)-band due to the traffic asymmetry. We consider the possibility of deploying multiple Time Division Duplexing (TDD) small eNBs (SeNBs) in the unused UL spectrum. In this scenario, time synchronization with macro eNB (MeNB) and neighboring SeNBs becomes essential. Two algorithms are proposed in order to ensure orthogonality of OFDM transmissions network-wide.

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