Random Transmit Power Control for DSRC and its Application to Cooperative Safety
| Autor: | Cristina Rico Garcia, Thomas Strang, Bernhard Kloiber, Jérôme Härri, Stephan Sand |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
business.industry
Network packet Computer science Random Transmit Power Control Reliability (computer networking) 020302 automobile design & engineering 020206 networking & telecommunications 02 engineering and technology Transmitter power output Congestion Control Dedicated short-range communications Network congestion Awareness Control 0203 mechanical engineering Safety-critical Vehicular Communications 0202 electrical engineering electronic engineering information engineering Wireless DSRC Electrical and Electronic Engineering business Communication channel Power control Computer network |
| Zdroj: | IEEE Transactions on Dependable and Secure Computing. 13:18-31 |
| ISSN: | 1545-5971 |
| Popis: | Cooperative safety applications require dedicated short-range communications (DSRC) to provide position-awareness of neighboring vehicles at a specific level of reliability, i.e., awareness-quality, up to a given distance, i.e., awareness-range. However, heavy communication loads negatively impact such awareness requirements due to communication impairments, ranging from strict capacity limitations of DSRC channels to correlated packet collisions due to periodic communication patterns. Transmission control strategies may adapt power or rate to control such impairments but risk missing the requirements of cooperative safety applications. In this paper, we design a new awareness control strategy by implementing a spatial awareness framework. Specifically, we adapt the distribution of the awareness-quality as a function of the awareness-range. Therefore, we first propose random transmit power control (RTPC), which manages to provide different levels of awareness-quality at different ranges, while mitigating correlated packet collisions by randomizing them in space. As RTPC is able to reduce the channel load, we secondly propose to combine RTPC with transmit rate control (TRC) and to benefit from the gained channel resources by subsequently increasing the update-rate and by implication, the quality of position-awareness. The spatial awareness control capability of RTPC $+$ TRC has been evaluated through simulations. We discuss the influence of RTPC $+$ TRC on cooperative safety applications exemplarily for the forward collision warning (FCW) application. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|