Title :
Analysis of Optimal Random Access for Broadcasting with Deadline in Cognitive Radio Networks
Author_Institution :
Dept. of Math. Educ., Sangmyung Univ., Seoul, South Korea
Abstract :
This letter considers optimal random access scheme for broadcasting in cognitive radio network where multiple secondary users (SUs) contend to access the channel based on the slotted-Aloha with a common access probability. SUs try to opportunistically send broadcast messages to their neighbors using the time slots unused by primary users (PUs). It is assumed that broadcast message is neither acknowledged nor retransmitted and further has a strict delivery deadline. In this scenario, we consider successful delivery probability of message within the delivery deadline as performance measure of interest. The objective is to explicitly obtain the optimal access probability maximizing the successful delivery probability.
Keywords :
access protocols; broadcast communication; cognitive radio; probability; radio access networks; radio broadcasting; radio transmitters; random processes; wireless channels; PU; SU; broadcast message delivery deadline probability; cognitive radio network; multiple secondary user; optimal common access probability; optimal random access analysis; primary user; radio broadcasting; slotted-ALOHA; time slot; Ad hoc networks; Broadcasting; Cognitive radio; IEEE 802.11 Standards; Numerical models; Sensors; Throughput; Cognitive radio network; broadcast; performance analysis; slotted-Aloha; successful delivery probability;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.012213.122755