IEICE TRANSACTIONS on Communications
Performance Evaluation of Inter-Vehicle Packet Relay for Road-Vehicle Communication in Fast Mobile Environment
Summary :
In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs). However, vehicle speeds are so fast that the channel condition between the terminals and the APs constantly changes because of changing path loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce the relative speed between the terminals and the APs by an inter-vehicle packet relay technique. If a terminal can send data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We, first, validate our method by a numerical analysis using a statistical path-loss model. The numerical analysis verifies that our method is able to suppress deterioration caused by path loss and time-varying fading. However, in the numerical analysis, geometric propagation of paths is not considered; instantaneous and rapid loss changes are not considered. Therefore, we evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Furthermore, we investigate the combination of our method and the selection diversity technique, which can suppress channel fluctuation and may enhance the performance of our method. Moreover, we measure interference in the overlapped zone between two AP areas. From the measurement, we show that our packet relays do not cause a problem in interference between areas.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E90-B No.9 pp.2552-2561
- Publication Date
- 2007/09/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e90-b.9.2552
- Type of Manuscript
- PAPER
- Category
- Terrestrial Radio Communications
Authors
Keyword
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Takayuki YAMADA, Ryoichi SHINKUMA, Tatsuro TAKAHASHI, "Performance Evaluation of Inter-Vehicle Packet Relay for Road-Vehicle Communication in Fast Mobile Environment" in IEICE TRANSACTIONS on Communications,
vol. E90-B, no. 9, pp. 2552-2561, September 2007, doi: 10.1093/ietcom/e90-b.9.2552.
Abstract: In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs). However, vehicle speeds are so fast that the channel condition between the terminals and the APs constantly changes because of changing path loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce the relative speed between the terminals and the APs by an inter-vehicle packet relay technique. If a terminal can send data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We, first, validate our method by a numerical analysis using a statistical path-loss model. The numerical analysis verifies that our method is able to suppress deterioration caused by path loss and time-varying fading. However, in the numerical analysis, geometric propagation of paths is not considered; instantaneous and rapid loss changes are not considered. Therefore, we evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Furthermore, we investigate the combination of our method and the selection diversity technique, which can suppress channel fluctuation and may enhance the performance of our method. Moreover, we measure interference in the overlapped zone between two AP areas. From the measurement, we show that our packet relays do not cause a problem in interference between areas.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e90-b.9.2552/_p
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@ARTICLE{e90-b_9_2552,
author={Takayuki YAMADA, Ryoichi SHINKUMA, Tatsuro TAKAHASHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Evaluation of Inter-Vehicle Packet Relay for Road-Vehicle Communication in Fast Mobile Environment},
year={2007},
volume={E90-B},
number={9},
pages={2552-2561},
abstract={In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs). However, vehicle speeds are so fast that the channel condition between the terminals and the APs constantly changes because of changing path loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce the relative speed between the terminals and the APs by an inter-vehicle packet relay technique. If a terminal can send data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We, first, validate our method by a numerical analysis using a statistical path-loss model. The numerical analysis verifies that our method is able to suppress deterioration caused by path loss and time-varying fading. However, in the numerical analysis, geometric propagation of paths is not considered; instantaneous and rapid loss changes are not considered. Therefore, we evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Furthermore, we investigate the combination of our method and the selection diversity technique, which can suppress channel fluctuation and may enhance the performance of our method. Moreover, we measure interference in the overlapped zone between two AP areas. From the measurement, we show that our packet relays do not cause a problem in interference between areas.},
keywords={},
doi={10.1093/ietcom/e90-b.9.2552},
ISSN={1745-1345},
month={September},}
Copy
TY - JOUR
TI - Performance Evaluation of Inter-Vehicle Packet Relay for Road-Vehicle Communication in Fast Mobile Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 2552
EP - 2561
AU - Takayuki YAMADA
AU - Ryoichi SHINKUMA
AU - Tatsuro TAKAHASHI
PY - 2007
DO - 10.1093/ietcom/e90-b.9.2552
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E90-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 2007
AB - In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs). However, vehicle speeds are so fast that the channel condition between the terminals and the APs constantly changes because of changing path loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce the relative speed between the terminals and the APs by an inter-vehicle packet relay technique. If a terminal can send data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We, first, validate our method by a numerical analysis using a statistical path-loss model. The numerical analysis verifies that our method is able to suppress deterioration caused by path loss and time-varying fading. However, in the numerical analysis, geometric propagation of paths is not considered; instantaneous and rapid loss changes are not considered. Therefore, we evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Furthermore, we investigate the combination of our method and the selection diversity technique, which can suppress channel fluctuation and may enhance the performance of our method. Moreover, we measure interference in the overlapped zone between two AP areas. From the measurement, we show that our packet relays do not cause a problem in interference between areas.
ER -
English
