Real-Time Multimedia Transmission over Cognitive Radio Networks

  • Haiyan Luo
  • Song Ci
  • Dalei Wu
  • Zhiyong Feng
  • Hui Tang


Cognitive radio (CR) has been proposed as a promising solution to improve connectivity, self-adaptability, and efficiency of spectrum usage. When used in video applications, user-perceived video quality experienced by secondary users is a very important performance metric to evaluate the effectiveness of CR technologies. However, most current research only considers spectrum utilization and effectiveness at MAC and PHY layers, ignoring the system performance of upper layers. Therefore, in this chapter we aim to improve the user experience of secondary users for wireless video services over cognitive radio networks. We propose a quality-driven cross-layer optimized system to maximize the expected user-perceived video quality at the receiver end, under the constraint of packet delay bound. By formulating network functions such as encoder behavior, cognitive MAC scheduling, transmission, as well as modulation and coding into a distortion-delay optimization framework, important system parameters residing in different network layers are jointly optimized in a systematic way to achieve the best user-perceived video quality for secondary users in cognitive radio networks. Furthermore, the proposed problem is formulated into a MIN-MAX problem and solved by using dynamic programming. The performance enhancement of the proposed system is evaluated through extensive experiments based on H.264/AVC.


Medium Access Control Primary User Secondary User Packet Delay Cognitive Radio Network 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Haiyan Luo
    • 1
  • Song Ci
    • 2
  • Dalei Wu
    • 1
  • Zhiyong Feng
    • 3
  • Hui Tang
    • 4
  1. 1.University of Nebraska-LincolnOmahaUSA
  2. 2.College of EngineeringUniversity of Nebraska-LincolnOmahaUSA
  3. 3.Beijing University of Posts and TelecommunicationsBeijingChina
  4. 4.Defense R&D CanadaOttawaCanada

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