VANET Link Characteristics and Analysis in Urban and Suburban by HC11121318410

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									VANET Link Characteristics and
Analysis in Urban and Suburban
Scenarios
Authors:Yang Yang, Jun Xu,Da Cheng, Li-
hua Wu, Peng-ju Tan, Lin-tao Yang
Adviser: Yu-Chiang Li
Speaker: Gung-Shian Lin
Date:2010/06/14
International Conference on , vol., no.,
pp.84-88, 25-27 May 2008




南台科技大學     資訊工程系
Outline

     1             Introduction


     2      Background and Related work


     3    Experimental setup and Details


     4    Experimental results and Analysis

     5             Conclusion



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   1. Introduction


 That environment affects the quality of the wireless
  link in VANET greatly.

 We have built an application for wireless data
  dissemination and visualization in VANET.




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   2. Background and Related work


 Considering VANET are distributed, self-organizing
  communication networks and are thus characterized
  by very high node.

 As the IEEE 802.llp standard implemented in the
  future, VANETs are expected to be of great benefit
  for safety applications.




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   3. Experimental setup and Details
 A. Relevant Definition

    The RSSI value per bit is directly related to the SNR (Signal
     to noise ratio) per bit.

    The packet loss rate (PLR) is the ratio of the number of lost
     packets to the total number of packets transmitted per
     second.




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   3. Experimental setup and Details
 B. General Setup




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3. Experimental setup and Details




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   4. Experimental results and Analysis
 A. Effect of Environmental Diversity to Wireless Link
    We perform the experiment in suburban and urban
     scenarios, which are representative in wireless channel in
     VANET.




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   4. Experimental results and Analysis
 B. Effects of RSSI to VANET Wireless Link
   We calculate the average of the RSSI values according to
    the different distance scales, and then compare them with
    the average of PLR in the same scenario.




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   4. Experimental results and Analysis
 C. Predicting the VANET wireless link By PLBL
   1. Experiment Results
        • we define the number of the lost sequential packets in a time as
          Packet loss Burst Length (PLBL).




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4. Experimental results and Analysis
     • We calculate the possibilities of PLBL per time unit, categorize
       them by distance scales, and then compare the average tendency
       with PLR's.




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   5. Conclusion


 Environment affects the quality of the wireless link in
  VANET greatly



 At the communication distance range, in most extend,
  the PLR is related to the distance variation.




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 RSSI is not coherent with PLR, which is not helpful in
  predicting the quality of the VANET wireless link.



 In certain aspects, the sum of possibilities of PLBL is
  another way to predict the 802.11 wireless channel
  quality.



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南台科技大學   資訊工程系

								
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