Network Coordinated Opportunistic Beamforming in Downlink Cellular Networks

Won-Yong SHIN; Bang Chul JUNG

doi:10.1587/transcom.E95.B.1393

Network Coordinated Opportunistic Beamforming in Downlink Cellular Networks

Won-Yong SHIN, Bang Chul JUNG

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We propose a network coordinated opportunistic beamforming (NC-OBF) protocol for downlink K-cell networks with M-antenna base stations (BSs). In the NC-OBF scheme, based on pseudo-randomly generated BF vectors, a user scheduling strategy is introduced, where each BS opportunistically selects a set of mobile stations (MSs) whose desired signals generate the minimum interference to the other MSs. Its performance is then analyzed in terms of degrees-of-freedom (DoFs). As our achievability result, it is shown that KM DoFs are achievable if the number N of MSs in a cell scales at least as SNR^KM-1, where SNR denotes the received signal-to-noise ratio. Furthermore, by deriving the corresponding upper bound on the DoFs, it is shown that the NC-OBF scheme is DoF-optimal. Note that the proposed scheme does not require the global channel state information and dimension expansion, thereby resulting in easier implementation.

Publication: IEICE TRANSACTIONS on Communications Vol.E95-B No.4 pp.1393-1396

Publication Date: 2012/04/01

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Online ISSN: 1745-1345

DOI: 10.1587/transcom.E95.B.1393

Type of Manuscript: LETTER

Category: Fundamental Theories for Communications

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Won-Yong SHIN, Bang Chul JUNG, "Network Coordinated Opportunistic Beamforming in Downlink Cellular Networks" in IEICE TRANSACTIONS on Communications, vol. E95-B, no. 4, pp. 1393-1396, April 2012, doi: 10.1587/transcom.E95.B.1393.
Abstract: We propose a network coordinated opportunistic beamforming (NC-OBF) protocol for downlink K-cell networks with M-antenna base stations (BSs). In the NC-OBF scheme, based on pseudo-randomly generated BF vectors, a user scheduling strategy is introduced, where each BS opportunistically selects a set of mobile stations (MSs) whose desired signals generate the minimum interference to the other MSs. Its performance is then analyzed in terms of degrees-of-freedom (DoFs). As our achievability result, it is shown that KM DoFs are achievable if the number N of MSs in a cell scales at least as SNR^KM-1, where SNR denotes the received signal-to-noise ratio. Furthermore, by deriving the corresponding upper bound on the DoFs, it is shown that the NC-OBF scheme is DoF-optimal. Note that the proposed scheme does not require the global channel state information and dimension expansion, thereby resulting in easier implementation.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E95.B.1393/_p

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@ARTICLE{e95-b_4_1393,
author={Won-Yong SHIN, Bang Chul JUNG, },
journal={IEICE TRANSACTIONS on Communications},
title={Network Coordinated Opportunistic Beamforming in Downlink Cellular Networks},
year={2012},
volume={E95-B},
number={4},
pages={1393-1396},
abstract={We propose a network coordinated opportunistic beamforming (NC-OBF) protocol for downlink K-cell networks with M-antenna base stations (BSs). In the NC-OBF scheme, based on pseudo-randomly generated BF vectors, a user scheduling strategy is introduced, where each BS opportunistically selects a set of mobile stations (MSs) whose desired signals generate the minimum interference to the other MSs. Its performance is then analyzed in terms of degrees-of-freedom (DoFs). As our achievability result, it is shown that KM DoFs are achievable if the number N of MSs in a cell scales at least as SNR^KM-1, where SNR denotes the received signal-to-noise ratio. Furthermore, by deriving the corresponding upper bound on the DoFs, it is shown that the NC-OBF scheme is DoF-optimal. Note that the proposed scheme does not require the global channel state information and dimension expansion, thereby resulting in easier implementation.},
keywords={},
doi={10.1587/transcom.E95.B.1393},
ISSN={1745-1345},
month={April},}

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TY - JOUR
TI - Network Coordinated Opportunistic Beamforming in Downlink Cellular Networks
T2 - IEICE TRANSACTIONS on Communications
SP - 1393
EP - 1396
AU - Won-Yong SHIN
AU - Bang Chul JUNG
PY - 2012
DO - 10.1587/transcom.E95.B.1393
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E95-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2012
AB - We propose a network coordinated opportunistic beamforming (NC-OBF) protocol for downlink K-cell networks with M-antenna base stations (BSs). In the NC-OBF scheme, based on pseudo-randomly generated BF vectors, a user scheduling strategy is introduced, where each BS opportunistically selects a set of mobile stations (MSs) whose desired signals generate the minimum interference to the other MSs. Its performance is then analyzed in terms of degrees-of-freedom (DoFs). As our achievability result, it is shown that KM DoFs are achievable if the number N of MSs in a cell scales at least as SNR^KM-1, where SNR denotes the received signal-to-noise ratio. Furthermore, by deriving the corresponding upper bound on the DoFs, it is shown that the NC-OBF scheme is DoF-optimal. Note that the proposed scheme does not require the global channel state information and dimension expansion, thereby resulting in easier implementation.
ER -