Transmission latency and reliability trade-off in path-time coded cognitive radio ad hoc networks

Yi Chi Chen, I. Wei Lai, Kwang Cheng Chen, Wen Tsuen Chen, Chia Han Lee

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

    4 Citations (Scopus)

    Abstract

    Cognitive radio ad hoc network (CRAHN) is considered as a key technology to enhance the spectrum efficiency for diverse applications. However, due to the opportunistic links, the intrinsic randomness of the CRAHN makes the traditional precise control of the end-to-end transmission unscalable and generally infeasible. The recently-proposed virtual multiple-input multiple-output (MIMO) framework exploits the multipath routing to create the diversity at the network layer. With only local information and no feedback control channel, the path-time code (PTC) of the virtual MIMO system is able to efficiently provide the error resilient end-to-end transmission. In particular, while the transmission latency should be minimized, more attempts for accessing the opportunistic links can be made if a larger latency is allowed, which improves the error rate performance of the end-to-end transmission. By theoretically analyzing the error rate performance and erasure statistics, we propose a design guideline to determine the waiting period as the limit of the transmission latency. This designed waiting period not only preserves the diversity gained by the PTC but also provides a low transmission latency, resulting in a good balance of the reliability-latency trade-off of the end-to-end PTC transmission in CRAHNs.

    Original languageEnglish
    Title of host publication2014 IEEE Global Communications Conference, GLOBECOM 2014
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages1084-1089
    Number of pages6
    ISBN (Electronic)9781479935116
    DOIs
    Publication statusPublished - 2014 Feb 9
    Event2014 IEEE Global Communications Conference, GLOBECOM 2014 - Austin, United States
    Duration: 2014 Dec 82014 Dec 12

    Publication series

    Name2014 IEEE Global Communications Conference, GLOBECOM 2014

    Conference

    Conference2014 IEEE Global Communications Conference, GLOBECOM 2014
    CountryUnited States
    CityAustin
    Period2014/12/082014/12/12

    Keywords

    • Cognitive radio ad hoc networks (CRAHNs)
    • erasure channel
    • path-time code (PTC)
    • PEP analysis
    • space-time code (STC)
    • virtual multiple-input and multiple-output (MIMO)

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Networks and Communications
    • Communication

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