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Evaluating the impact of user behavior on D2D communications in millimeter-wave small cells

Evaluating the impact of user behavior on D2D communications in millimeter-wave small cells
Evaluating the impact of user behavior on D2D communications in millimeter-wave small cells
Small cells in millimeter-wave (mmWave) band are able to provide multigigabit access data rates and have emerged as a cost-efficient solution to offer interference-free device-todevice (D2D) communications. In order to improve system performances and enhance user experiences, direct transmissions between devices need to be scheduled properly. We first propose a transmission scheduling scheme for radio access of small cells in the mmWave band, termed directional D2D medium access
control (D3MAC), whereby a path-selection criterion is designed to enable D2D transmissions. Through extensive simulations, we demonstrate that D3MAC achieves near-optimal performances and outperforms other schemes significantly in terms of delay and throughput. Based on this near-optimal scheme, we then evaluate the impact of user behaviors, including the traffic mode and traffic load, as well as user density, denseness, and mobility, on the performance of D2D communications inmmWave small cells. Our study reveals that the performance of D2D communications is improved, as the user density and denseness increase, but this effect is only obvious under heavy traffic loads. Furthermore, user mobility is shown to be another important factor that influences the performance of D2D communications. The system performance is first improved, as the average user speed increases from static, but the performance is degraded significantly when the user speed becomes high.
0018-9545
6362-6377
Gao, Chuhan
cef2c39c-7c72-423f-924a-e50773d2cad8
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Fu, Haohao
379e7baf-4506-4094-851e-2e28e6c5925c
Niu, Yong
80bd6b04-d691-4685-9c87-1b0a65efa5ab
Jin, Depeng
34805f84-d29e-4c6e-b3d9-21bf8a0abb8c
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Zhu, Han
70b555a3-7673-4022-bda7-de132dc9186e
Gao, Chuhan
cef2c39c-7c72-423f-924a-e50773d2cad8
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Fu, Haohao
379e7baf-4506-4094-851e-2e28e6c5925c
Niu, Yong
80bd6b04-d691-4685-9c87-1b0a65efa5ab
Jin, Depeng
34805f84-d29e-4c6e-b3d9-21bf8a0abb8c
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Zhu, Han
70b555a3-7673-4022-bda7-de132dc9186e

Gao, Chuhan, Li, Yong, Fu, Haohao, Niu, Yong, Jin, Depeng, Chen, Sheng and Zhu, Han (2017) Evaluating the impact of user behavior on D2D communications in millimeter-wave small cells. IEEE Transactions on Vehicular Technology, 66 (7), 6362-6377. (doi:10.1109/TVT.2016.2642127).

Record type: Article

Abstract

Small cells in millimeter-wave (mmWave) band are able to provide multigigabit access data rates and have emerged as a cost-efficient solution to offer interference-free device-todevice (D2D) communications. In order to improve system performances and enhance user experiences, direct transmissions between devices need to be scheduled properly. We first propose a transmission scheduling scheme for radio access of small cells in the mmWave band, termed directional D2D medium access
control (D3MAC), whereby a path-selection criterion is designed to enable D2D transmissions. Through extensive simulations, we demonstrate that D3MAC achieves near-optimal performances and outperforms other schemes significantly in terms of delay and throughput. Based on this near-optimal scheme, we then evaluate the impact of user behaviors, including the traffic mode and traffic load, as well as user density, denseness, and mobility, on the performance of D2D communications inmmWave small cells. Our study reveals that the performance of D2D communications is improved, as the user density and denseness increase, but this effect is only obvious under heavy traffic loads. Furthermore, user mobility is shown to be another important factor that influences the performance of D2D communications. The system performance is first improved, as the average user speed increases from static, but the performance is degraded significantly when the user speed becomes high.

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Accepted/In Press date: 29 July 2016
e-pub ahead of print date: 20 December 2016
Published date: 14 July 2017

Identifiers

Local EPrints ID: 412737
URI: http://eprints.soton.ac.uk/id/eprint/412737
ISSN: 0018-9545
PURE UUID: 6b4334f9-3bc8-405e-8afc-ee93742e4e14

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Date deposited: 28 Jul 2017 16:30
Last modified: 06 Oct 2020 21:24

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