Multicell Coordinated Scheduling with Multiuser Zero-Forcing Beamforming

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Coordinated scheduling/beamforming (CS/CB) is a cost-effective coordinated multipoint (CoMP) transmission paradigm that has been incorporated in the recent long-term evolution cellular standard. In this paper, we study CS/CB with the aim of developing low-complexity multicell coordinated user scheduling policies. We focus on a class of multicell interfering broadcast networks in which base stations have only local data and local channel state information, but each has sufficient antennas to serve multiple users using zero-forcing beamforming. The coordination problem is formulated as finding scheduling decisions across the cells such that the network sum rate is maximized. Starting from the two-cell model, we uncover the structure for a good scheduling decision, which in turn leads to the definition of two distributed scheduling policies of differing complexity and intercell coordination. Asymptotic theoretical bounds on the average sum rate are derived to predict the performance of the policies proposed. We extend to some example networks containing more than two cells and develop network-wide coordination policies. Numerical results confirm the effectiveness of the proposed policies and shed light on practical coordinated system design.

LanguageEnglish
Article number7270337
Pages827-842
Number of pages16
JournalIEEE Transactions on Wireless Communications
Volume15
Issue number2
DOIs
Publication statusPublished - 1 Feb 2016

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Zero-forcing
Beamforming
Scheduling
Scheduling Policy
Cell
Distributed Scheduling
Channel State Information
Broadcast
Low Complexity
System Design
Antenna
Long Term Evolution (LTE)
Paradigm
Channel state information
Sufficient
Predict
Base stations
Numerical Results
Costs
Systems analysis

Cite this

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title = "Multicell Coordinated Scheduling with Multiuser Zero-Forcing Beamforming",
abstract = "Coordinated scheduling/beamforming (CS/CB) is a cost-effective coordinated multipoint (CoMP) transmission paradigm that has been incorporated in the recent long-term evolution cellular standard. In this paper, we study CS/CB with the aim of developing low-complexity multicell coordinated user scheduling policies. We focus on a class of multicell interfering broadcast networks in which base stations have only local data and local channel state information, but each has sufficient antennas to serve multiple users using zero-forcing beamforming. The coordination problem is formulated as finding scheduling decisions across the cells such that the network sum rate is maximized. Starting from the two-cell model, we uncover the structure for a good scheduling decision, which in turn leads to the definition of two distributed scheduling policies of differing complexity and intercell coordination. Asymptotic theoretical bounds on the average sum rate are derived to predict the performance of the policies proposed. We extend to some example networks containing more than two cells and develop network-wide coordination policies. Numerical results confirm the effectiveness of the proposed policies and shed light on practical coordinated system design.",
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Multicell Coordinated Scheduling with Multiuser Zero-Forcing Beamforming. / Li, Min; Collings, Iain B.; Hanly, Stephen V.; Liu, Chunshan; Whiting, Philip.

In: IEEE Transactions on Wireless Communications, Vol. 15, No. 2, 7270337, 01.02.2016, p. 827-842.

Research output: Contribution to journalArticleResearchpeer-review

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