DS-CDMA IVC方案和CSMA/OFDM IVC方案的性能评价

2013 13th International Conference on ITS Telecommunications (ITST) Pub Date : 2013-12-19 DOI:10.1109/ITST.2013.6685516

Sho Sakakibara, K. Ohno, M. Itami

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引用次数: 8

摘要

基于CSMA/OFDM方案的车辆间通信(IVC)系统，如IEEE802.11p或日本ARIB STD-T109，由于使用CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) MAC协议易于构建自治分布式网络，因此得到了广泛的发展。然而，CSMA网络中的隐藏终端会导致性能下降。在之前的研究中，我们提出了一种新的基于码分多址(CDMA)的IVC方案来减轻隐藏终端的影响，并在简单直路模型下评估了该方案的性能。然而，在假设多径衰落的城市道路模型中，没有对两种IVC方案的性能进行评价。本文对DS-CDMA IVC方案和CSMA/OFDM IVC方案在城市道路模型中的性能进行了评价。仿真结果表明，CSMA/OFDM IVC的PER (Packet Error Rate)性能优于DS-CDMA。另一方面，与CSMA/OFDM相比，DS-CDMA显示出能够实现低延迟通信的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance evaluation of DS-CDMA IVC scheme and CSMA/OFDM IVC scheme

The inter-vehicle communication (IVC) systems based on CSMA/OFDM scheme such as IEEE802.11p or ARIB STD-T109 in Japan are widely developed because autonomous distributed networks are easily made by using the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) MAC protocol. However, the hidden terminals in CSMA networks cause the performance degradation. In our previous study, a new IVC scheme using Code Division Multiple Access (CDMA) had been proposed to mitigate the impact of hidden terminals and evaluated the performance in the simple straight road model. However, performances of both IVC schemes are not evaluated in the urban area road model assuming multipath fading. In this paper, performances of the DS-CDMA IVC scheme and CSMA/OFDM IVC scheme are evaluated in urban area road model. As the results of simulations, it was confirmed that the PER (Packet Error Rate) performances of CSMA/OFDM IVC can be made better than the DS-CDMA. On the other hand, DS-CDMA shows the possibility that it is able to achieve a low delay communication as compared with CSMA/OFDM.

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2013 13th International Conference on ITS Telecommunications (ITST)

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