Open AccessExploiting Multichannel Diversity in Spectrum Sharing Systems Using Optimal Stopping Rule
Author(s) -
Xu Yuhua,
Wu Qihui,
Wang Jinlong,
Anpalagan Alagan,
Xu Yitao
Publication year - 2012
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.12.0211.0274
Subject(s) - optimal stopping , stopping rule , channel (broadcasting) , computer science , throughput , sequence (biology) , spectrum (functional analysis) , signal to noise ratio (imaging) , mathematical optimization , algorithm , mathematics , telecommunications , wireless , physics , quantum mechanics , biology , genetics
This letter studies the problem of exploiting multichannel diversity in a spectrum sharing system, where the secondary user (SU) sequentially explores channel state information on the licensed channels with time consumption. To maximize the expected achievable throughput for the SU, we formulate this problem as an optimal stopping problem, whose objective is to choose the right channel to stop exploration based on the observed signal‐to‐noise ratio sequence. Moreover, we propose a myopic but optimal rule, called one‐stage look‐ahead rule, to solve the stopping problem.