Edge aware cross-tier base station cooperation in heterogeneous wireless networks with non-uniformly-distributed nodes

Kun Yang; Jiaxin Zhang; Xing Zhang; Wenbo Wang

Edge aware cross-tier base station cooperation in heterogeneous wireless networks with non-uniformly-distributed nodes

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Author(s): Kun Yang ¹ ; Jiaxin Zhang ¹ ; Xing Zhang ^{1, 2} ; Wenbo Wang ¹
- Affiliations: 1: School of Information and Communication Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, People’s Republic of China ;
  2: Beijing Advanced Innovation Center for Future Internet Technology, Beijing University of Technology (BJUT), Beijing, People’s Republic of China
Source: Volume 10, Issue 15, 13 October 2016, p. 1896 – 1903
DOI: 10.1049/iet-com.2016.0125 , Print ISSN 1751-8628, Online ISSN 1751-8636

This is an open access article published by the IET under the Creative Commons Attribution -NonCommercial License (http://creativecommons.org/licenses/by-nc/3.0/)

Received 31/01/2016, Accepted 05/07/2016, Revised 23/05/2016, Published 13/10/2016

This study investigates the cross-tier base station (BS) cooperation in non-uniform heterogeneous networks where the distribution of pico BSs (PBSs) is modelled as Neyman–Scott cluster process. The authors propose an edge aware cross-tier cooperation scheme to improve the performance of edge hotspot users that have weaker signal-to-interference-plus-noise ratio (SINR). Taking consideration of various user behaviours, non-hotspot users are only served by the nearest macro BS whilst the hotspot users with better SINR are only served by their serving PBSs. The edge hotspot users who suffer from high cross-tier interference operate in the cooperation mode. Stochastic geometry is utilised to derive the SINR and energy efficiency performance of the proposed scheme, which is compared with other classical schemes such as full cooperation (FC) and traditional non-cooperation scheme. Numerical results show that compared with the FC scheme, the proposed scheme can maximise the energy efficiency of the network by an optimal cooperation threshold, when SINR coverage is larger than a threshold. The authors also find that user behaviour have little effect on the tradeoff between SINR Coverage and energy efficiency, unless spatial aggregation coefficient is very small.

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Edge aware cross-tier base station cooperation in heterogeneous wireless networks with non-uniformly-distributed nodes

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