Title page for etd-0622113-141224


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URN etd-0622113-141224
Author Yun-Jhu Cai
Author's Email Address No Public.
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Department Electrical Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title OC-MAC: An Opportunistic Cooperative MAC Protocol for Cognitive Vehicular Networks
Date of Defense 2013-06-20
Page Count 70
Keyword
  • medium access control
  • cooperative communications
  • opportunistic spectrum access
  • cognitive radio network
  • vehicular network
  • Abstract In this thesis, we can consider an application scenario in cognitive vehicular networks: Under the condition that different vehicles in different locations may have different set of available licensed channels, how do the vehicles (called potential relays) that correctly received data from the gateway choose the proper channel to concurrently relay the data to the vehicles (called potential destinations) that did not receive data from the gateway such that the network throughput can be maximized. We call this problem the IMP (interference-free multi-channel poly-matching) problem. To the best of our knowledge, our thesis is the first one that seriously addresses and studies this issue.
    The contributions of this thesis are mainly three-fold: (1) We use semi-bipartite graph and mathematical programming to formally model the IMP problem. (2) We design a centralized greedy algorithm to efficiently and effectively solve this problem. (3) On the basis of centralized greedy algorithm , we design a novel distributed medium access control protocol, named opportunistic cooperative MAC (OC-MAC for short), such that only via local information exchange between vehicles, the number of potential destinations that finally receive data from potential relays can be maximized. 
    Simulation results demonstrated that the throughput of OC-MAC is approximately equal to that of centralized greedy algorithm and is far superior to that of Random MAC.
    Advisory Committee
  • Tsang-Ling Sheu - chair
  • Kuo-Feng Chen - co-chair
  • Kao-Shing Huang - co-chair
  • Tsung-Chuan Huang - co-chair
  • Zi-Tsan Chou - advisor
  • Files
  • etd-0622113-141224.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-07-23

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