TY - JOUR
T1 - Session-Based Cooperation in Cognitive Radio Networks
T2 - A Network-Level Approach
AU - Ding, Haichuan
AU - Zhang, Chi
AU - Li, Xuanheng
AU - Liu, Jianqing
AU - Pan, Miao
AU - Fang, Yuguang
AU - Chen, Shigang
N1 - Publisher Copyright:
© 1993-2012 IEEE.
PY - 2018/4
Y1 - 2018/4
N2 - Currently, the cooperation-based spectrum access in cognitive radio networks (CRNs) is implemented via cooperative communications based on link-level frame-based cooperative (LLC) approach, where individual secondary users (SUs) independently serve as relays for primary users (PUs) in order to gain spectrum access opportunities. Unfortunately, this LLC approach cannot fully exploit spectrum access opportunities to enhance the throughput of CRNs and fails to motivate PUs to join the spectrum sharing processes. To address these challenges, we propose a network-level session-based cooperative (NLC) approach, where SUs are grouped together to cooperate with PUs session by session, instead of frame by frame, for spectrum access opportunities of the corresponding group. To articulate our NLC approach, we further develop an NLC scheme under a cognitive capacity harvesting network architecture. We formulate the cooperative mechanism design as a cross-layer optimization problem with constraints on primary session selection, flow routing and link scheduling. Through extensive simulations, we demonstrate the effectiveness of the proposed NLC approach.
AB - Currently, the cooperation-based spectrum access in cognitive radio networks (CRNs) is implemented via cooperative communications based on link-level frame-based cooperative (LLC) approach, where individual secondary users (SUs) independently serve as relays for primary users (PUs) in order to gain spectrum access opportunities. Unfortunately, this LLC approach cannot fully exploit spectrum access opportunities to enhance the throughput of CRNs and fails to motivate PUs to join the spectrum sharing processes. To address these challenges, we propose a network-level session-based cooperative (NLC) approach, where SUs are grouped together to cooperate with PUs session by session, instead of frame by frame, for spectrum access opportunities of the corresponding group. To articulate our NLC approach, we further develop an NLC scheme under a cognitive capacity harvesting network architecture. We formulate the cooperative mechanism design as a cross-layer optimization problem with constraints on primary session selection, flow routing and link scheduling. Through extensive simulations, we demonstrate the effectiveness of the proposed NLC approach.
KW - Cognitive radio networks
KW - cross-layer optimization
KW - dynamic spectrum sharing
KW - link scheduling
KW - multi-hop multi-path routing
UR - http://www.scopus.com/inward/record.url?scp=85041684129&partnerID=8YFLogxK
U2 - 10.1109/TNET.2018.2794261
DO - 10.1109/TNET.2018.2794261
M3 - Article
AN - SCOPUS:85041684129
SN - 1063-6692
VL - 26
SP - 685
EP - 698
JO - IEEE/ACM Transactions on Networking
JF - IEEE/ACM Transactions on Networking
IS - 2
ER -