Rate Adaptation Mechanism with Available Data Rate Trimming and Data Rate Information Provision for V2I Communications
| Autor: | Shigeru Kaneda, Shigeru Kashihara, Takemi Sahara, Chikara Ohta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
050210 logistics & transportation
Article Subject Computer Networks and Communications business.industry Computer science media_common.quotation_subject 05 social sciences Real-time computing 020206 networking & telecommunications 02 engineering and technology TK5101-6720 Discount points Computer Science Applications 0502 economics and business 0202 electrical engineering electronic engineering information engineering Telecommunication Wireless Trimming Quality (business) business Multipath propagation Degradation (telecommunications) Drawback media_common Communication channel |
| Zdroj: | Mobile Information Systems, Vol 2019 (2019) |
| Popis: | We study a rate adaptation mechanism for improving communication performance between a connected vehicle and a roadside unit (RSU) using Wi-Fi during movement in a vehicle-to-infrastructure (V2I) environment. Wi-Fi communication provides various attractive services to connected vehicles during movement. However, as a connected vehicle is generally moving at high speed, the communication performance with an RSU that works as an access point is degraded because wireless link quality fluctuates abruptly and continuously. We then propose a rate adaptation mechanism employing the following two main features to mitigate such deterioration in communication performance: available data rate trimming and data rate information provision. To alleviate degradation of communication, the former avoids usage of excessively low data rates and the latter then provides data rate information suitable for channel quality from a dataset of adequate data rates based on the vehicle’s location and speed. However, the data rate information provided from a dataset may not always be appropriate because of various indefinite factors such as multipath fading and shadowing. Thus, the proposed method also employs a measurement-based function to compensate for such a drawback of the dataset. Simulation experiments evaluate communication performance for 10, 60, and 100 km/h in single-vehicle and multiple-vehicles cases. Simulation results showed that the proposed method overall provides superior communication performance in situations involving more than one vehicle, in comparison with existing counter- and sample-based methods. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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