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Efficiency and Coexistence Strategies for Cognitive Radio

  • N. Sai Shankar

Cognitive radio devices have been considered as a key technology for next-generation of wireless communication. These devices can opportunistically utilize the wireless spectrum to achieve better individual device/user performance and improve the overall spectrum-utilization efficiency. However, allowing opportunistic use of the wireless spectrum creates new problems such as peaceful coexistence with other wireless technologies as well as understanding the influence of interference that each of these networks can create. In this chapter we model the efficiency of the cognitive radios from the Medium Access Control (MAC) analytically and study the improvement that cognitive radios can get compared to conventional radios. Then we consider the effect of peaceful coexistence with different types of cognitive radios and also consider a simple spectrum sensing protocol which is a function of the primary utilization and required opportunity.

Keywords

Medium Access Control Cognitive Radio Access Scheme Primary Network Secondary 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 2007

Authors and Affiliations

  • N. Sai Shankar
    • 1
  1. 1.Corporate R&D Systems EngineeringQualcomm IncorporatedSan DiegoUSA

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