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    Secondary access based on sensing and primary ARQ feedback in spectrum sharing systems

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    Type
    Conference Paper
    Authors
    Hamza, Doha R.
    Aissa, Sonia
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2012-04
    Permanent link to this record
    http://hdl.handle.net/10754/564539
    
    Metadata
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    Abstract
    In the context of primary/secondary spectrum sharing, we propose a randomized secondary access strategy with access probabilities that are a function of both the primary automatic repeat request (ARQ) feedback and the spectrum sensing outcome. The primary terminal operates in a time slotted fashion and is active only when it has a packet to send. The primary receiver can send a positive acknowledgment (ACK) when the received packet is decoded correctly. Lack of ARQ feedback is interpreted as erroneous reception or inactivity. We call this the explicit ACK scheme. The primary receiver may also send a negative acknowledgment (NACK) when the packet is received in error. Lack of ARQ feedback is interpreted as an ACK or no-transmission. This is called the explicit NACK scheme. Under both schemes, when the primary feedback is interpreted as a NACK, the secondary user assumes that there will be retransmission in the next slot and accesses the channel with a certain probability. When the primary feedback is interpreted as an ACK, the secondary user accesses the channel with either one of two probabilities based on the sensing outcome. Under these settings, we find the three optimal access probabilities via maximizing the secondary throughput given a constraint on the primary throughput. We compare the performance of the explicit ACK and explicit NACK schemes and contrast them with schemes based on either sensing or primary ARQ feedback only. © 2012 IEEE.
    Citation
    Hamza, D., & Aissa, S. (2012). Secondary access based on sensing and primary ARQ feedback in spectrum sharing systems. 2012 IEEE Wireless Communications and Networking Conference (WCNC). doi:10.1109/wcnc.2012.6214016
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    2012 IEEE Wireless Communications and Networking Conference (WCNC)
    Conference/Event name
    2012 IEEE Wireless Communications and Networking Conference, WCNC 2012
    ISBN
    9781467304375
    DOI
    10.1109/WCNC.2012.6214016
    ae974a485f413a2113503eed53cd6c53
    10.1109/WCNC.2012.6214016
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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