Effects of location awareness on concurrent transmissions for cognitive ad hoc networks overlaying infrastructure-based systems

Li-Chun Wang*, Anderson Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

Through wide-band spectrum sensing, cognitive radio (CR) can identify the opportunity of reusing the frequency spectrum of other wireless systems. However, wide-band spectrum sensing requires energy consumption processes. In this paper, we aim to relieve the burden of spectrum scanning in a CR system by means of location awareness. We investigate to what extent a CR system with location awareness capability can establish a scanning-free region where a peer-to-peer connection of the secondary CR users can coexist with an infrastructure-based connection of the primary user. We compute the concurrent transmission probability of a peer-to-peer connection and an infrastructure-based connection in a system based on the carrier sense multiple access with collision avoidance (CSMA/CA) medium access control (MAC) protocol. It has been shown that the frequency band of the legacy system can be reused up to 45% by the overlaying cognitive ad hoc network if certain location techniques help CR users locate primary and other secondary users.

Original languageEnglish
Article number4509435
Pages (from-to)577-589
Number of pages13
JournalIEEE Transactions on Mobile Computing
Volume8
Issue number5
DOIs
StatePublished - 1 May 2009

Keywords

  • Ad hoc networks
  • Carrier sense multiple acces
  • Cognitive radio
  • MAC protocol

Fingerprint Dive into the research topics of 'Effects of location awareness on concurrent transmissions for cognitive ad hoc networks overlaying infrastructure-based systems'. Together they form a unique fingerprint.

Cite this