Interference Management in 5G Reverse TDD HetNets: A Large System Analysis

Abstract : This work analyzes a heterogeneous network (HetNet), which comprises a macro base station (BS) equipped with a large number of antennas and an overlaid dense tier of small cell access points (SCAs) using a wireless backhaul for data traffic. The static and low mobility user equipments (UEs) are associated with the SCAs while those with medium-to-high mobility are served by the macro BS. A reverse time division duplexing (TDD) protocol is used by the two tiers, which allows the BS to locally estimate both the intra-tier and inter-tier channels. This knowledge is then used at the BS either in the uplink (UL) or in the downlink (DL) to simultaneously serve the macro UEs (MUEs) and to provide the wireless backhaul to SCAs. A concatenated linear precoding technique employing either zero-forcing (ZF) or regularized ZF is used at the BS to simultaneously serve MUEs and SCAs in DL while nulling interference toward those SCAs in UL. We evaluate and characterize the performance of the system through the power consumption of UL and DL transmissions under the assumption that target rates must be satisfied and imperfect channel state information is available for MUEs. The analysis is conducted in the asymptotic regime where the number of BS antennas and the network size (MUEs and SCAs) grow large with fixed ratios. Results from large system analysis are used to provide concise formulae for the asymptotic UL and DL transmit powers and precoding vectors under the above assumptions. Numerical results are used to validate the analysis in different settings and to make comparisons with alternative network architectures.
Type de document :
Communication dans un congrès
1st International Conference on 5G for Ubiquitous Connectivity - 5GU 2014, Nov 2014, Levi, Finland. Proceedings of the 1st International Conference on 5G for Ubiquitous Connectivity, 30 p., 12 figures
Liste complète des métadonnées

Littérature citée [14 références]  Voir  Masquer  Télécharger

https://hal-supelec.archives-ouvertes.fr/hal-01084655
Contributeur : Matha Deghel <>
Soumis le : mercredi 19 novembre 2014 - 17:04:48
Dernière modification le : lundi 14 mai 2018 - 09:40:55
Document(s) archivé(s) le : vendredi 20 février 2015 - 11:11:51

Fichier

camera_ready_5GU.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01084655, version 1
  • ARXIV : 1407.6481

Collections

Citation

Luca Sanguinetti, Aris Moustakas, Merouane Debbah. Interference Management in 5G Reverse TDD HetNets: A Large System Analysis. 1st International Conference on 5G for Ubiquitous Connectivity - 5GU 2014, Nov 2014, Levi, Finland. Proceedings of the 1st International Conference on 5G for Ubiquitous Connectivity, 30 p., 12 figures. 〈hal-01084655〉

Partager

Métriques

Consultations de la notice

193

Téléchargements de fichiers

97