Network-Listening Based Synchronization with Loop-Back Interference Avoidance Using Synchronization Signal

Mitsukuni KONISHI; Sho NABATAME; Daigo OGATA; Atsushi NAGATE; Teruya FUJII

doi:10.1587/transcom.2017EBP3122

Network-Listening Based Synchronization with Loop-Back Interference Avoidance Using Synchronization Signal

Mitsukuni KONISHI, Sho NABATAME, Daigo OGATA, Atsushi NAGATE, Teruya FUJII

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Network-listening-based synchronization is recently attracting attention as an effective timing synchronization method for indoor small-cell base stations as they cannot utilize GPS-based synchronization. It uses only the macro-cell downlink signal to establish synchronization with the overlaying macro cell. However, the loop-back signal from the small-cell base station itself interferes with the reception of the macro-cell downlink signal in the deployment of co-channel heterogeneous networks. In this paper, we investigate a synchronization method that avoids loop-back interference by muting small-cell data transmission and shifting small-cell transmission timing. Our proposal enables to reduce the processing burden of the network listening and mitigate the throughput degradation of the small cell caused by the data-transmission mutation. In addition to this, the network-listening system enables the network listening in dense small cell deployments where a large number of neighboring small cells exist. We clarify the performance of our proposal by computer simulations and laboratory experiments on actual equipment.

Publication: IEICE TRANSACTIONS on Communications Vol.E101-B No.3 pp.885-896

Publication Date: 2018/03/01

Publicized: 2017/09/11

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2017EBP3122

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Mitsukuni KONISHI
  SoftBank Corp.
Sho NABATAME
  SoftBank Corp.
Daigo OGATA
  SoftBank Corp.
Atsushi NAGATE
  SoftBank Corp.
Teruya FUJII
  SoftBank Corp.

Keyword

overlaid cell structure, HetNet, small cell, timing synchronization, network listening, radio-interface based synchronization

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Mitsukuni KONISHI, Sho NABATAME, Daigo OGATA, Atsushi NAGATE, Teruya FUJII, "Network-Listening Based Synchronization with Loop-Back Interference Avoidance Using Synchronization Signal" in IEICE TRANSACTIONS on Communications, vol. E101-B, no. 3, pp. 885-896, March 2018, doi: 10.1587/transcom.2017EBP3122.
Abstract: Network-listening-based synchronization is recently attracting attention as an effective timing synchronization method for indoor small-cell base stations as they cannot utilize GPS-based synchronization. It uses only the macro-cell downlink signal to establish synchronization with the overlaying macro cell. However, the loop-back signal from the small-cell base station itself interferes with the reception of the macro-cell downlink signal in the deployment of co-channel heterogeneous networks. In this paper, we investigate a synchronization method that avoids loop-back interference by muting small-cell data transmission and shifting small-cell transmission timing. Our proposal enables to reduce the processing burden of the network listening and mitigate the throughput degradation of the small cell caused by the data-transmission mutation. In addition to this, the network-listening system enables the network listening in dense small cell deployments where a large number of neighboring small cells exist. We clarify the performance of our proposal by computer simulations and laboratory experiments on actual equipment.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2017EBP3122/_p

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@ARTICLE{e101-b_3_885,
author={Mitsukuni KONISHI, Sho NABATAME, Daigo OGATA, Atsushi NAGATE, Teruya FUJII, },
journal={IEICE TRANSACTIONS on Communications},
title={Network-Listening Based Synchronization with Loop-Back Interference Avoidance Using Synchronization Signal},
year={2018},
volume={E101-B},
number={3},
pages={885-896},
abstract={Network-listening-based synchronization is recently attracting attention as an effective timing synchronization method for indoor small-cell base stations as they cannot utilize GPS-based synchronization. It uses only the macro-cell downlink signal to establish synchronization with the overlaying macro cell. However, the loop-back signal from the small-cell base station itself interferes with the reception of the macro-cell downlink signal in the deployment of co-channel heterogeneous networks. In this paper, we investigate a synchronization method that avoids loop-back interference by muting small-cell data transmission and shifting small-cell transmission timing. Our proposal enables to reduce the processing burden of the network listening and mitigate the throughput degradation of the small cell caused by the data-transmission mutation. In addition to this, the network-listening system enables the network listening in dense small cell deployments where a large number of neighboring small cells exist. We clarify the performance of our proposal by computer simulations and laboratory experiments on actual equipment.},
keywords={},
doi={10.1587/transcom.2017EBP3122},
ISSN={1745-1345},
month={March},}

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TY - JOUR
TI - Network-Listening Based Synchronization with Loop-Back Interference Avoidance Using Synchronization Signal
T2 - IEICE TRANSACTIONS on Communications
SP - 885
EP - 896
AU - Mitsukuni KONISHI
AU - Sho NABATAME
AU - Daigo OGATA
AU - Atsushi NAGATE
AU - Teruya FUJII
PY - 2018
DO - 10.1587/transcom.2017EBP3122
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E101-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2018
AB - Network-listening-based synchronization is recently attracting attention as an effective timing synchronization method for indoor small-cell base stations as they cannot utilize GPS-based synchronization. It uses only the macro-cell downlink signal to establish synchronization with the overlaying macro cell. However, the loop-back signal from the small-cell base station itself interferes with the reception of the macro-cell downlink signal in the deployment of co-channel heterogeneous networks. In this paper, we investigate a synchronization method that avoids loop-back interference by muting small-cell data transmission and shifting small-cell transmission timing. Our proposal enables to reduce the processing burden of the network listening and mitigate the throughput degradation of the small cell caused by the data-transmission mutation. In addition to this, the network-listening system enables the network listening in dense small cell deployments where a large number of neighboring small cells exist. We clarify the performance of our proposal by computer simulations and laboratory experiments on actual equipment.
ER -