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

Version 2 2024-06-05, 07:15
Version 1 2020-07-07, 08:19
conference contribution
posted on 2024-06-05, 07:15 authored by Y Yang, KW Sung, Jihong ParkJihong Park, SL Kim, KS Kim
© 2017 IEEE. 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.

History

Pagination

1-6

Location

Oulu, Finland

Start date

2017-06-12

End date

2017-06-15

ISBN-13

9781538638736

Language

eng

Publication classification

E1.1 Full written paper - refereed

Title of proceedings

EuCNC 2017 - Proceedings of the 2017 European Conference on Networks and Communications

Event

Networks and Communications. European Conference (2017 : Oulu, Finland)

Publisher

IEEE

Place of publication

Piscataway, N.J.

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