Submitted on: 26 May 2011.
Revised on: 21 June 2011.
Accepted on: 18 August 2011.
___________________IEEE Vehicular Technology Magazine
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Submitted on: 30 October 2022.
Revised on: 06 January 2023.
Accepted on: 23 January 2023.
___________________IEEE Vehicular Technology Magazine
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Submitted on: 30 October 2004.
Revised on: 01 January 2005.
Accepted on: 24 February 2005.
___________________IEEE Vehicular Technology Magazine
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