Network coding-based broadcasting schemes for cognitive radio networks

Khaqan Zaheer, Mubashir Husain Rehmani, Mohamed Othman

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


Tremendous growth in the field of wireless communication and widespread usage of handheld devices make the spectrum overcrowded. According to a survey of the Federal Communications Commission (FCC), only 15–85% of the spectrum is being utilized which compels the researcher to develop technologies for opportunistic spectrum utilization. The emerging field of cognitive radio networks (CRN) provides an exciting solution to solve the problem of spectrum scarcity and to improve spectrum utilization by opportunistic utilization of spectrum. In CRN, the secondary users (SUs) utilize the spectrum which is licensed to primary radio users (PUs) when the spectrum is idle and it has to vacate when they return to that channel. However, channel heterogeneity and diversity in CRN make it challenging for unlicensed users to know about the availability and accessibility of channel without prior information about spectrum. Moreover, the broadcast collision due to simultaneous reception of broadcast messages at the same node and PU activity results into waste of network resources which should be mitigated in multi-hop CRN. The challenges of using network coding for broadcasting include PU detection, unpredictable channel availability, heterogeneous channels, contention among SUs, broadcasting over multiple channels, channel selection, neighbour discovery coordination, collision avoidance through distributed access spectrum, new coding schemes and spectrum sensing. NC can be used in CRN for encoding packets to provide an adequate solution for broadcasting problems by improving spectrum efficiency, adapting the behaviour of primary user, improving packet dissemination ratio, minimizing number of packet retransmission and efficient recovery of information at the receiver for effective and efficient transmission of information across network. In this chapter we provide a comprehensive survey of NC-based broadcasting schemes for CRN.

Original languageEnglish
Title of host publicationEAI/Springer Innovations in Communication and Computing
Number of pages50
Publication statusPublished - 2019

Publication series

NameEAI/Springer Innovations in Communication and Computing
ISSN (Print)2522-8595
ISSN (Electronic)2522-8609


  • Broadcast Scheme
  • Channel Availability
  • Coding Opportunities
  • Cognitive Radio Networks (CRN)
  • Network Coding


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