TY - GEN
T1 - Coordinated beamforming in clustered HetNets
T2 - 2014 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2014
AU - Nagaraj, Shirish
AU - Hsieh, Frank
AU - Pengoria, Deepak
AU - Raghavendra, M. R.
AU - Schamberger, Mark
AU - Honig, Michael
N1 - Publisher Copyright:
© 2014 IEEE.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/10/22
Y1 - 2014/10/22
N2 - In this paper, we consider interference issues arising in HetNets where the small-cells are deployed in closely-spaced clusters. Such dense deployments pose an important challenge for scaling throughput proportional to the number of cells, since inter-cell interference becomes a key bottleneck for achieving high capacity. We examine key design issues around the use of coordinated beamforming (CBF) strategies for mitigating inter-small-cell interference in such clustered layouts. In particular, we show that system planning of the sounding reference signal (SRS), along with multi-user channel estimation approaches, are critical to realize the benefits of CBF. We also develop key notions of beneficiary sets and co-operative clusters for enabling such interference mitigation in cellular networks. Through extensive and detailed system simulations, we showcase the benefits of the proposed system designs for two use cases: (1) a dense urban Micro-cellular deployment, and (2) a clustered small-cell Stadium deployment. System parameter optimization of SRS power control and co-operative cluster size are also developed. Significant capacity gains are observed for both these deployments using the proposed system design in clustered small-cell topologies.
AB - In this paper, we consider interference issues arising in HetNets where the small-cells are deployed in closely-spaced clusters. Such dense deployments pose an important challenge for scaling throughput proportional to the number of cells, since inter-cell interference becomes a key bottleneck for achieving high capacity. We examine key design issues around the use of coordinated beamforming (CBF) strategies for mitigating inter-small-cell interference in such clustered layouts. In particular, we show that system planning of the sounding reference signal (SRS), along with multi-user channel estimation approaches, are critical to realize the benefits of CBF. We also develop key notions of beneficiary sets and co-operative clusters for enabling such interference mitigation in cellular networks. Through extensive and detailed system simulations, we showcase the benefits of the proposed system designs for two use cases: (1) a dense urban Micro-cellular deployment, and (2) a clustered small-cell Stadium deployment. System parameter optimization of SRS power control and co-operative cluster size are also developed. Significant capacity gains are observed for both these deployments using the proposed system design in clustered small-cell topologies.
UR - http://www.scopus.com/inward/record.url?scp=84912051907&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84912051907&partnerID=8YFLogxK
U2 - 10.1109/WCNCW.2014.6934863
DO - 10.1109/WCNCW.2014.6934863
M3 - Conference contribution
AN - SCOPUS:84912051907
T3 - 2014 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2014
SP - 70
EP - 75
BT - 2014 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2014
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 6 April 2014 through 9 April 2014
ER -