Analysis of the local delay with slotted-ALOHA based cognitive radio ad hoc networks

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• 作者：Jing Gao (1)
  Changchuan Yin (2)
  
  1. School of Electronics and Communication Engineering ; Tianjin Normal University ; West Bin Shui Road ; Xiqing District ; Tianjin ; 300387 ; China
  2. School of Information and Communication Engineering ; Beijing University of Posts and Telecommunications ; Xi Tu Cheng Road ; Haidian District ; Beijing ; 100876 ; China
  
• 关键词：Local delay ; Cognitive radio networks ; Overlay ; Slotted ALOHA
• 刊名：EURASIP Journal on Wireless Communications and Networking
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：2015
• 期：1
• 全文大小：571 KB
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• 刊物主题：Signal, Image and Speech Processing;
• 出版者：Springer International Publishing
• ISSN：1687-1499

文摘

We analyze the local delay of cognitive radio ad hoc networks in which secondary nodes are overlaid with a pair of primary nodes. Supposing slotted ALOHA multiple access is adopted by secondary nodes, we derive the closed-form expression of the local delay by modeling the channel occupied by primary nodes as continuous-time Markov on-off process. Furthermore, we obtain the asymptotic local delay for two special cases: large and small primary traffic. We theoretically prove that the local delay increases with the increasing primary packet arrival rate and decreases with the increasing primary packet departure rate. Numerical and simulation results show that the local delay could be approximated to be the result obtained with significant primary traffic in most cases, which is the steady of the channel idle state.