Title :
Throughput and Delay Analysis for Real-Time Applications in Ad-Hoc Cognitive Networks
Author :
Piazza, Diego ; Cosman, Pamela ; Milstein, Laurence B. ; Tartara, Guido
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milan, Italy
Abstract :
We consider a simple ad-hoc cognitive scenario with two data up-links, one licensed to use the spectral resource (primary) and the other unlicensed (secondary or cognitive). It is assumed that the cognitive link accesses the channel only when the channel is sensed idle. An ON-OFF channel model is used for the primary link, where traffic statistical characteristics are taken into account. A closed-form expression for the signal-to noise-plus interference (SINR) statistics of the cognitive nodes is derived that can be used for estimating the network performance. Moreover, a M/G/1 queueing model is exploited for deriving a simple expression for the average packet delay. Finally, a MAC strategy based on a channel-and-queue aware scheduling is introduced.
Keywords :
access protocols; ad hoc networks; cognitive radio; delays; queueing theory; radiofrequency interference; resource allocation; scheduling; statistical analysis; M/G/1 queueing model; MAC strategy; ON-OFF channel model; ad-hoc cognitive networks; average packet delay analysis; channel-and-queue aware scheduling; closed-form expression; cognitive link; cognitive nodes; data uplinks; dynamic resource allocation; signal-to noise-plus interference statistics; spectral resource; throughput analysis; traffic statistical characteristics; Ad hoc networks; Cognitive radio; Interference; Peer to peer computing; Resource management; Scheduling; Signal to noise ratio; Telecommunication traffic; Throughput; Traffic control;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2010 IEEE
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4244-6396-1
DOI :
10.1109/WCNC.2010.5506370
