Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model

Yanpeng Yang; Ki Won Sung; Jihong Park; Seong Lyun Kim; Kwang Soon Kim

doi:10.1109/EuCNC.2017.7980732

Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model

Yanpeng Yang, Ki Won Sung, Jihong Park, Seong Lyun Kim, Kwang Soon Kim

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

In an ultra-dense network (UDN) where there are more base stations (BSs) than active users, it is possible that many BSs are instantaneously left idle. Thus, how to utilize these dormant BSs by means of cooperative transmission is an interesting question. In this paper, we investigate the performance of a UDN with two types of cooperation schemes: Non-coherent joint transmission (JT) without channel state information (CSI) and coherent JT with full CSI knowledge. We consider a bounded dual-slope path loss model to describe UDN environments where a user has several BSs in the near-field and the rest in the far-field. Numerical results show that non-coherent JT cannot improve the user spectral efficiency (SE) due to the simultaneous increment in signal and interference powers. For coherent JT, the achievable SE gain depends on the range of near-field, the relative densities of BSs and users, and the CSI accuracy. Finally, we assess the energy efficiency (EE) of cooperation in UDN. Despite costing extra energy consumption, cooperation can still improve EE under certain conditions.

Original language	English
Title of host publication	EuCNC 2017 - European Conference on Networks and Communications
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781538638736
DOIs	https://doi.org/10.1109/EuCNC.2017.7980732
Publication status	Published - 2017 Jul 13
Event	2017 European Conference on Networks and Communications, EuCNC 2017 - Oulu, Finland Duration: 2017 Jun 12 → 2017 Jun 15

Publication series

Name	EuCNC 2017 - European Conference on Networks and Communications

Other

Other	2017 European Conference on Networks and Communications, EuCNC 2017
Country	Finland
City	Oulu
Period	17/6/12 → 17/6/15

Bibliographical note

Funding Information:
ACKNOWLEDGMENT This research has been partly supported by the H2020 project METIS-II co-funded by the EU. The views expressed are those of the authors and do not necessarily represent the project. It was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2015K2A3A1000189).

All Science Journal Classification (ASJC) codes

Computer Networks and Communications
Hardware and Architecture

Access to Document

10.1109/EuCNC.2017.7980732

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Cite this

Yang, Y., Sung, K. W., Park, J., Kim, S. L., & Kim, K. S. (2017). Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model. In EuCNC 2017 - European Conference on Networks and Communications [7980732] (EuCNC 2017 - European Conference on Networks and Communications). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/EuCNC.2017.7980732

Yang, Yanpeng ; Sung, Ki Won ; Park, Jihong ; Kim, Seong Lyun ; Kim, Kwang Soon. / Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model. EuCNC 2017 - European Conference on Networks and Communications. Institute of Electrical and Electronics Engineers Inc., 2017. (EuCNC 2017 - European Conference on Networks and Communications).

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Yang, Y, Sung, KW, Park, J, Kim, SL & Kim, KS 2017, Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model. in EuCNC 2017 - European Conference on Networks and Communications., 7980732, EuCNC 2017 - European Conference on Networks and Communications, Institute of Electrical and Electronics Engineers Inc., 2017 European Conference on Networks and Communications, EuCNC 2017, Oulu, Finland, 17/6/12. https://doi.org/10.1109/EuCNC.2017.7980732

Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model. / Yang, Yanpeng; Sung, Ki Won; Park, Jihong; Kim, Seong Lyun ; Kim, Kwang Soon.

EuCNC 2017 - European Conference on Networks and Communications. Institute of Electrical and Electronics Engineers Inc., 2017. 7980732 (EuCNC 2017 - European Conference on Networks and Communications).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N1 - Funding Information: ACKNOWLEDGMENT This research has been partly supported by the H2020 project METIS-II co-funded by the EU. The views expressed are those of the authors and do not necessarily represent the project. It was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2015K2A3A1000189).

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AB - In an ultra-dense network (UDN) where there are more base stations (BSs) than active users, it is possible that many BSs are instantaneously left idle. Thus, how to utilize these dormant BSs by means of cooperative transmission is an interesting question. In this paper, we investigate the performance of a UDN with two types of cooperation schemes: Non-coherent joint transmission (JT) without channel state information (CSI) and coherent JT with full CSI knowledge. We consider a bounded dual-slope path loss model to describe UDN environments where a user has several BSs in the near-field and the rest in the far-field. Numerical results show that non-coherent JT cannot improve the user spectral efficiency (SE) due to the simultaneous increment in signal and interference powers. For coherent JT, the achievable SE gain depends on the range of near-field, the relative densities of BSs and users, and the CSI accuracy. Finally, we assess the energy efficiency (EE) of cooperation in UDN. Despite costing extra energy consumption, cooperation can still improve EE under certain conditions.

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Yang Y, Sung KW, Park J, Kim SL , Kim KS. Cooperative transmissions in ultra-dense networks under a bounded dual-slope path loss model. In EuCNC 2017 - European Conference on Networks and Communications. Institute of Electrical and Electronics Engineers Inc. 2017. 7980732. (EuCNC 2017 - European Conference on Networks and Communications). https://doi.org/10.1109/EuCNC.2017.7980732