Open AccessTraffic‐Adaptive Proactive Spectrum Handoff Strategy for Graded Secondary Users in Cognitive Radio Networks
Author(s) -
Zhang Lei,
Song Tiecheng,
Wu Ming,
Bao Xu,
Guo Jie,
Hu Jing
Publication year - 2015
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2015.10.030
Subject(s) - handover , cognitive radio , computer network , computer science , queueing theory , spectrum (functional analysis) , scheme (mathematics) , telecommunications , wireless , mathematics , mathematical analysis , physics , quantum mechanics
In order to meet different delay requirements of various communication services in Cognitive radio (CR) networks, Secondary users (SUs) are divided into two classes according to the priority of accessing to spectrum in this paper. Based on the proactive spectrum handoff scheme, the Preemptive resume priority (PRP) M/G/1 queueing is used to characterize multiple spectrum handoffs under two different spectrum handoff strategies. The traffic‐adaptive spectrum handoff strategy is proposed for graded SUs so as to minimize the average cumulative handoff delay. Simulation results not only verify that our theoretical analysis is valid, but also show that the strategy we proposed can reduce the average cumulative handoff delay evidently. The effect of service rate on the proposed spectrum switching point and the admissible access region are provided.