A joint coding and scheduling method for delay optimal cognitive multiple access

Wei Chen, Khaled B. Letaief, Zhigang Cao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

21 Citations (Scopus)

Abstract

Cognitive radio (CR) is an emerging and powerful solution that can significantly improve the utilization of limited radio spectrum resources by allowing secondary users to borrow unused spectrum from primary licensed networks. In conventional CR protocols, a secondary user (SU) is allowed to transmit only when the primary users (PU) are not active. However, waiting for idle timeslots may induce large packet delay and loss and result in poor quality of service (QoS) for the secondary user. To overcome this, a joint coding and scheduling method for cognitive multiple access is proposed in this paper. In the physical layer, a successive interference decoder is utilized to thoroughly mitigate the SU's interference to PU. A joint channel-aware and queue-aware scheduling protocol is then proposed, at the MAC layer, to minimize the average packet delay of SU given an average transmit power constraint. We shall formulate Markov models to derive the analytical results of delay, packet-loss rate, and power consumption of the proposed scheme. The optimal scheduling parameter and the minimal average delay are also obtained by solving a cross-layer optimization problem.

Original languageEnglish
Title of host publicationICC 2008 - IEEE International Conference on Communications, Proceedings
Pages3558-3562
Number of pages5
DOIs
Publication statusPublished - 12 Sep 2008
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: 19 May 200823 May 2008

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486

Other

OtherIEEE International Conference on Communications, ICC 2008
CountryChina
CityBeijing
Period19/5/0823/5/08

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Keywords

  • Cognitive radio and networks
  • Cross-layer design
  • Delay
  • Multiple access
  • Power efficiency

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

Chen, W., Letaief, K. B., & Cao, Z. (2008). A joint coding and scheduling method for delay optimal cognitive multiple access. In ICC 2008 - IEEE International Conference on Communications, Proceedings (pp. 3558-3562). [4533705] (IEEE International Conference on Communications). https://doi.org/10.1109/ICC.2008.669