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GCC: Group-Based CSI Feedback Compression for MU-MIMO Networks

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Abstract

Multi-user Multiple Input Multiple Output networks (MU-MIMO) adopts beamforming to enable Access Point (AP) to transmit packets concurrently to multiple users, which brings formidable overhead. The overhead of collecting Channel State Information (CSI) feedback matrix may even overwhelm real data transmission when the scale of network is large, which incurs unsatisfactory performance and huge waste of resources. In this paper, we address this urgent problem with GCC, a Group-based CSI feedback Compression scheme for MU-MIMO networks, which enables users to feedback their CSI in terms of group determined by their location. Instead of traditional per-packet scheme, GCC limit the quantity of CSI feedback in each transmission round regardless of the size of network by allowing the location-related users to share a CSI matrix. We use a novel metric to do the tradeoff between throughput and capacity loss of the system. We realize GCC in different scenarios and compare it with exist works, evaluation result reveals that GCC can achieve much higher throughput and is robust to various situations.

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Acknowledgements

This work is supported by “National Natural Science Foundation of China” with No. 61733002 and “the Fundamental Research Funds for the Central Universities” with No. DUT17LAB16, No. DUT2017TB02. This work is also supported by Tianjin Key Laboratory of Advanced Networking (TANK), School of Computer Science and Technology, Tianjin University, Tianjin China, 300350.

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Authors and Affiliations

  1. School of Software Technology, Dalian University of Technology, Dalian, China

    Jian Fang, Lei Wang, Zhenquan Qin, Jialin Liu & Bingxian Lu

  2. Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province, Dalian, China

    Jian Fang, Lei Wang, Zhenquan Qin, Jialin Liu & Bingxian Lu

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  1. Jian Fang
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  2. Lei Wang
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  3. Zhenquan Qin
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  4. Jialin Liu
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Correspondence to Lei Wang.

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Fang, J., Wang, L., Qin, Z. et al. GCC: Group-Based CSI Feedback Compression for MU-MIMO Networks. Mobile Netw Appl 23, 407–418 (2018). https://doi.org/10.1007/s11036-018-1015-1

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  • DOI: https://doi.org/10.1007/s11036-018-1015-1

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